21. Letter from Mark H. McCormack to Colin MacLaine Creator: McCormack, Mark H.; MacLaine, Colin Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 27, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
22. Letter from Mark H. McCormack to David Lowe Creator: McCormack, Mark H.; Lowe, David Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 23, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
23. Letter from Mark H. McCormack to David R. Foster Creator: McCormack, Mark H.; Foster, David R. (David Ramsey), 1920-2010 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 4, 1978 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
24. Letter from Mark H. McCormack to Frank D. Tatum Creator: McCormack, Mark H.; Tatum, Frank D. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 25, 1982 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
25. Letter from Mark H. McCormack to Frank D. Tatum Jr. Creator: McCormack, Mark H.; Tatum, Frank D. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 22, 1990 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
26. Letter from Mark H. McCormack to Gene Talley Creator: McCormack, Mark H.; Talley, Gene Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 7, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
27. Letter from Mark H. McCormack to George Plimpton Creator: McCormack, Mark H.; Plimpton, George Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 5, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
28. Letter from Mark H. McCormack to George Wilson Creator: McCormack, Mark H.; Wilson, George, 1938-1997 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 17, 1979 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
29. Letter from Mark H. McCormack to Gordon Jeffrey Creator: McCormack, Mark H.; Jeffrey, Gordon Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 26, 1983 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
30. Letter from Mark H. McCormack to Gregory B. Peters Creator: McCormack, Mark H.; Peters, Gregory B. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 25, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
31. Letter from Mark H. McCormack to Ian Chapman Creator: McCormack, Mark H.; Chapman, Ian Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 10, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
32. Letter from Mark H. McCormack to Ian Wilson Creator: McCormack, Mark H.; Wilson, Ian Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 29, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
33. Letter from Mark H. McCormack to Joe Schwindemann Creator: McCormack, Mark H.; Schwindemann, Joe Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 29, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
34. Letter from Mark H. McCormack to John A. H. Curry Creator: McCormack, Mark H.; Curry, John Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 23, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
35. Letter from Mark H. McCormack to John Akers Creator: McCormack, Mark H.; Akers, John Fellows, 1934-2014 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
36. Letter from Mark H. McCormack to John Curry Creator: McCormack, Mark H.; Curry, John Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 9, 1984 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
37. Letter from Mark H. McCormack to John Curry Creator: McCormack, Mark H.; Curry, John Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 12, 1989 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
38. Letter from Mark H. McCormack to John E. Steel Creator: McCormack, Mark H.; Steel, John E. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 13, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
39. Letter from Mark H. McCormack to John W. McGrath Creator: McCormack, Mark H.; McGrath, John W. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 27, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
40. Letter from Mark H. McCormack to K. R. T. Mackenzie Creator: McCormack, Mark H.; MacKenzie, Keith Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 23, 1981 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives