541. Letter from Mark H. McCormack to Mats Hasselquist Creator: McCormack, Mark H.; Hasselquist, Mats Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 10, 1974 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
542. Letter from Mark H. McCormack to Maurie R. Davis Creator: McCormack, Mark H.; Davis, Maurie R. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 12, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
543. Letter from Mark H. McCormack to Michael Bonallack Creator: McCormack, Mark H.; Bonallack, Michael Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 16, 1985 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
544. Letter from Mark H. McCormack to Michael Bonallack Creator: McCormack, Mark H.; Bonallack, Michael Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 29, 1987 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
545. Letter from Mark H. McCormack to Michael Bonallack Creator: McCormack, Mark H.; Bonallack, Michael Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 16, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
546. Letter from Mark H. McCormack to Michael Bonallack Creator: McCormack, Mark H.; Bonallack, Michael Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 18, 1991 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
547. Letter from Mark H. McCormack to Michael Bonallack Creator: McCormack, Mark H.; Bonallack, Michael Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 30, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
548. Letter from Mark H. McCormack to Michael Heppner Creator: McCormack, Mark H.; Heppner, Michael Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 13, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
549. Letter from Mark H. McCormack to Mickey Powell Creator: McCormack, Mark H.; Powell, Mickey Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 31, 1986 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
550. Letter from Mark H. McCormack to Mike Sloan Creator: McCormack, Mark H.; Sloan, Mike Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: August 11, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
551. Letter from Mark H. McCormack to Milton Sandling Creator: McCormack, Mark H.; Sandling, Milton, 1923-2014 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 22, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
552. Letter from Mark H. McCormack to Morrie R. Davis Creator: McCormack, Mark H.; Davis, Maurie R. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 27, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
553. Letter from Mark H. McCormack to Nikki Tomlinson Creator: McCormack, Mark H.; Tomlinson, Nikki Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 24, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
554. 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
555. 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: March 5, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
556. 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
557. Letter from Mark H. McCormack to Norman Blake Creator: McCormack, Mark H.; Blake, Norman Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 30, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
558. Letter from Mark H. McCormack to Norman Blake Creator: McCormack, Mark H.; Blake, Norman Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 31, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
559. Letter from Mark H. McCormack to Owen Williams Creator: McCormack, Mark H.; Williams, Owen G. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 12, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
560. Letter from Mark H. McCormack to Patrick G. Duffeler Creator: McCormack, Mark H.; Duffeler, Patrick G. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 26, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives