401. Letter from Mark H. McCormack to Cyril Levan Creator: McCormack, Mark H.; Levan, Cyril Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 28, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
402. Letter from Mark H. McCormack to D. Gillings and T. Dwyer Creator: McCormack, Mark H., Gillings, D., and Dwyer, T. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 28, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
403. Letter from Mark H. McCormack to Dakin B. Ferris Creator: McCormack, Mark H.; Ferris, Dakin B. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 1, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
404. Letter from Mark H. McCormack to David Marsh Creator: McCormack, Mark H.; Marsh, David Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 29, 1988 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
405. Letter from Mark H. McCormack to David R. Foster Creator: McCormack, Mark H.; Foster, David R. (David Ramsey) Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 1, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
406. Letter from Mark H. McCormack to David R. Foster Creator: McCormack, Mark H.; Foster, David R. (David Ramsey) Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 1, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
407. 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: August 1, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
408. Letter from Mark H. McCormack to Deane Beman Creator: McCormack, Mark H.; Beman, Deane Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: August 8, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
409. Letter from Mark H. McCormack to Dennis Mathews Creator: McCormack, Mark H.; Mathews, Dennis 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
410. Letter from Mark H. McCormack to Dominique Mtote Creator: McCormack, Mark H.; Mtote, Dominique Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 25, 1976 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
411. Letter from Mark H. McCormack to Donald A. S. MacLellan Creator: McCormack, Mark H.; MacLellan, Donald A. S. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 15, 1985 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
412. Letter from Mark H. McCormack to Donald L. Schaffer Creator: McCormack, Mark H.; Schaffer, Donald L. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 18, 1974 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
413. Letter from Mark H. McCormack to Donald W. Giffin Creator: McCormack, Mark H.; Giffin, Donald W. 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
414. Letter from Mark H. McCormack to Doug McClure Creator: McCormack, Mark H.; McClure, Doug 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
415. Letter from Mark H. McCormack to Edward L. Barner Creator: McCormack, Mark H.; Barner, Edward L. 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
416. Letter from Mark H. McCormack to Elgar Laux Creator: McCormack, Mark H.; Laux, Elgar Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 26, 1967 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
417. Letter from Mark H. McCormack to Frank A. Olson Creator: McCormack, Mark H.; Olson, Frank A., 1932- 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
418. 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: November 4, 1985 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
419. 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: May 8, 1986 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
420. 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: November 20, 1992 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives