1. 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: September 3, 1976 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
2. 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: December 4, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
3. 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: February 26, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
4. Letter from Mark H. McCormack to Eustace E. Fannin Creator: McCormack, Mark H.; Fannin, Eustace E. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 9, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
5. Letter from Mark H. McCormack to Harvey J. Neale Creator: McCormack, Mark H.; Neale, Harvey J. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 8, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
6. Letter from Mark H. McCormack to Ian Wells Creator: McCormack, Mark H.; Wells, Ian Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 15, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
7. Letter from Mark H. McCormack to Jack Slater Creator: McCormack, Mark H.; Slater, Jack Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 15, 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: June 17, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
9. Letter from Mark H. McCormack to Joseph C. Dey Creator: McCormack, Mark H.; Dey, Joseph C. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 14, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
10. 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
11. 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
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: June 2, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
13. Letter from Mark H. McCormack to R. A. Becker Creator: McCormack, Mark H.; Becker, R. A. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 8, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
14. Letter from Mark H. McCormack to Rex B. Evans Creator: McCormack, Mark H.; Evans, Rex B. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 29, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
15. Letter from Mark H. McCormack to Rex Evans Creator: McCormack, Mark H.; Evans, Rex B. 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
16. Letter from Mark H. McCormack to Rex Evans Creator: McCormack, Mark H.; Evans, Rex B. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 20, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
17. Letter from Mark H. McCormack to Rex Evans Creator: McCormack, Mark H.; Evans, Rex B. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 5, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
18. Letter from Mark H. McCormack to William D. G. Trollip Creator: McCormack, Mark H.; Trollip, William D. G. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 18, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
19. Letter from Mark H. McCormack to William D. G. Trollip Creator: McCormack, Mark H.; Trollip, William D. G. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 26, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
20. Letter from Mark H. McCormack to William T. Tomicki Creator: McCormack, Mark H.; Tomicki, William T. 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