1. Letter from Mark H. McCormack to Hugh M. Austin Creator: McCormack, Mark H.; Austin, Hugh M. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 3, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
2. Letter from Mark H. McCormack to Robert Sargent Shriver Creator: McCormack, Mark H.; Shriver, Sargent, 1915-2011 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 16, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
3. Letter from Mark H. McCormack to Anton Rupert Creator: McCormack, Mark H.; Rupert, Anton Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: August 29, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
4. Letter from Mark H. McCormack to Frederick W. Heckel Creator: McCormack, Mark H.; Heckel, Frederick W. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 22, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
5. Letter from Mark H. McCormack to George E. Palmer Creator: McCormack, Mark H.; Palmer, George E. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 13, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
6. Letter from Mark H. McCormack to Henry Ogrodzinski Creator: McCormack, Mark H.; Ogrodzinski, Henry Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 23, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
7. Letter from Mark H. McCormack to Jay Michaels Creator: McCormack, Mark H.; Michaels, Jay 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
8. Letter from Mark H. McCormack to Jay Michaels Creator: McCormack, Mark H.; Michaels, Jay Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 18, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
9. Letter from Mark H. McCormack to Jay Michaels Creator: McCormack, Mark H.; Michaels, Jay Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 17, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
10. Letter from Mark H. McCormack to John H.Heckman Creator: McCormack, Mark H.; Heckman, John H. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 12, 1976 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
11. Letter from Mark H. McCormack to Jules Rosenthal Creator: McCormack, Mark H.; Rosenthal, Jules Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 1, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
12. 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: January 20, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
13. 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: January 20, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
14. 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
15. 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: June 13, 1979 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
16. Letter from Mark H. McCormack to Peter Macadam Creator: McCormack, Mark H.; Macadam, Peter Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 31, 1978 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
17. Letter from Mark H. McCormack to Ray Cave Creator: McCormack, Mark H.; Cave, Ray, 1929- Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 2, 1984 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
18. Letter from Mark H. McCormack to Richard Barkle Creator: McCormack, Mark H.; Barkle, Richard Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 19, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
19. Letter from Mark H. McCormack to Rod Gibson Creator: McCormack, Mark H.; Gibson, Rod Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 5, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
20. Letter from Mark H. McCormack to Stirling Moss Creator: McCormack, Mark H.; Moss, Stirling, 1929- Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 27, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives