621. Letter from Mark H. McCormack to Andre Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 22, 1990 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
622. Letter from Mark H. McCormack to Andre Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 10, 1987 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
623. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 19, 1985 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
624. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 22, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
625. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 5, 1985 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
626. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 14, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
627. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 25, 1974 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
628. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 3, 1982 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
629. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: August 13, 1981 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
630. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 1, 1984 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
631. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 17, 1991 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
632. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 8, 1987 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
633. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 20, 1987 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
634. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 3, 1988 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
635. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 30, 1990 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
636. Letter from Mark H. McCormack to Andre J. Heiniger Creator: McCormack, Mark H.; Heiniger, Andre J., 1921-2000 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 5, 1988 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
637. Letter from Mark H. McCormack to Andre R. Bossert Creator: McCormack, Mark H.; Bossert, Andre R. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 12, 1984 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
638. Letter from Mark H. McCormack to Andrew Brann Creator: McCormack, Mark H.; Brann, Andrew Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 23, 1987 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
639. Letter from Mark H. McCormack to Andrew W. Conway Creator: McCormack, Mark H.; Conway, Andrew W. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 5, 1984 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
640. Letter from Mark H. McCormack to Andy Pierce Creator: McCormack, Mark H.; Pierce, Andy Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 21, 1989 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives