501. Letter from Mark H. McCormack to Ned Post Creator: McCormack, Mark H.; Post, Ned Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 23, 1986 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
502. Letter from Mark H. McCormack to Nick Oppenheimer Creator: McCormack, Mark H.; Oppenheimer, Nicholas (Nicholas F.), 1945- Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 28, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
503. Letter from Mark H. McCormack to Noel Morris Creator: McCormack, Mark H.; Morris, Noel Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 28, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
504. Letter from Mark H. McCormack to Noel Morris Creator: McCormack, Mark H.; Morris, Noel Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 17, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
505. Letter from Mark H. McCormack to Noel Robins Creator: McCormack, Mark H.; Robins, Noel Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 13, 1986 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
506. Letter from Mark H. McCormack to Patricia Kyle Creator: McCormack, Mark H.; Kyle, Patricia Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 12, 1993 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
507. Letter from Mark H. McCormack to Patrick Foley Creator: McCormack, Mark H.; Foley, Patrick Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 14, 1991 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
508. Letter from Mark H. McCormack to Patrick Foley Creator: McCormack, Mark H.; Foley, Patrick Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 14, 1991 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
509. Letter from Mark H. McCormack to Paul John Creator: McCormack, Mark H.; John, Paul Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: August 23, 1982 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
510. Letter from Mark H. McCormack to Paul John Creator: McCormack, Mark H.; John, Paul Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 28, 1981 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
511. Letter from Mark H. McCormack to Paul L. John Creator: McCormack, Mark H.; John, Paul Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: [ca. April 3, 1981] Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
512. Letter from Mark H. McCormack to Paul Moseley Creator: McCormack, Mark H.; Moseley, Paul Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 20, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
513. Letter from Mark H. McCormack to Paul Tagliabue Creator: McCormack, Mark H.; Tagliabue, Paul Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 13, 1991 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
514. Letter from Mark H. McCormack to Paul Thayer Creator: McCormack, Mark H.; Thayer, Paul, 1919-2010 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 17, 1978 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
515. Letter from Mark H. McCormack to Paul Verkuil Creator: McCormack, Mark H.; Verkuil, Paul R. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 19, 1991 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
516. Letter from Mark H. McCormack to Paul W. Critchlow Creator: McCormack, Mark H.; Critchlow, Paul W. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 21, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
517. Letter from Mark H. McCormack to Paul W. Critchlow Creator: McCormack, Mark H.; Critchlow, Paul W. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 29, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
518. Letter from Mark H. McCormack to Pehr G. Gyllenhammar Creator: McCormack, Mark H.; Gyllenhammar, Pehr G., 1935- Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: August 12, 1983 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
519. Letter from Mark H. McCormack to Pete Rozelle Creator: McCormack, Mark H.; Rozelle, Pete, 1926-1996 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 4, 1988 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
520. Letter from Mark H. McCormack to Peter Bijur Creator: McCormack, Mark H.; Bijur, Peter I. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 21, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives