21. Letter from Mark H. McCormack to Gordon L. Hough Creator: McCormack, Mark H.; Hough, Gordon Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 6, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
22. Letter from Mark H. McCormack to Hisamitsu Ohnishi Creator: McCormack, Mark H.; Ohnishi, Hisamitsu Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 1, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
23. Letter from Mark H. McCormack to I. M. Jack Creator: McCormack, Mark H.; Jack, I. M. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: August 7, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
24. 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: May 18, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
25. Letter from Mark H. McCormack to J. Wayne Jones Creator: McCormack, Mark H.; Jones, J. Wayne Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 17, 1982 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
26. Letter from Mark H. McCormack to James B. Hoefer Creator: McCormack, Mark H.; Hoefer, James B. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 22, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
27. Letter from Mark H. McCormack to John King Creator: McCormack, Mark H.; King, John Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 18, 1974 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
28. Letter from Mark H. McCormack to John Lampe Creator: McCormack, Mark H.; Lampe, John Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 25, 1986 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
29. 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: July 20, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
30. Letter from Mark H. McCormack to Kenneth J. Whalen Creator: McCormack, Mark H.; Whalen, Kenneth J., 1923-2014 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 25, 1978 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
31. Letter from Mark H. McCormack to Kerry Packer Creator: McCormack, Mark H.; Packer, Kerry Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 29, 1976 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
32. 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
33. 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
34. 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
35. 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: February 28, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
36. Letter from Mark H. McCormack to Paul J. Graf Creator: McCormack, Mark H.; Graf, Paul J. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 25, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
37. Letter from Mark H. McCormack to Paul J. Graf Creator: McCormack, Mark H.; Graf, Paul J. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 30, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
38. Letter from Mark H. McCormack to Philip L. Thomas Creator: McCormack, Mark H.; Thomas, Philip L. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 14, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
39. Letter from Mark H. McCormack to R. H. Bartlett Creator: McCormack, Mark H.; Bartlett, R. H. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 20, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
40. Letter from Mark H. McCormack to Richard J. Ferris Creator: McCormack, Mark H.; Ferris, Richard J. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: August 13, 1982 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives