261. Letter from Mark H. McCormack to Fred 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: March 7, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
262. Letter from Mark H. McCormack to Fred 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: April 13, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
263. 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: March 11, 1974 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
264. 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: January 6, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
265. 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: February 12, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
266. 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: January 7, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
267. Letter from Mark H. McCormack to Gaetan Mourgue d'Algue Creator: McCormack, Mark H.; d'Algue, Gaetan Mourgue Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 21, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
268. Letter from Mark H. McCormack to Gar Laux Creator: McCormack, Mark H.; Laux, Elgar Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 13, 1967 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
269. Letter from Mark H. McCormack to Gaylord Donnelley Creator: McCormack, Mark H.; Donnelley, Gaylord Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 9, 1974 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
270. Letter from Mark H. McCormack to Gene Loveland Creator: McCormack, Mark H.; Loveland, Gene Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 9, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
271. Letter from Mark H. McCormack to George C. Foerstner Creator: McCormack, Mark H.; Foerstner, George C. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 20, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
272. Letter from Mark H. McCormack to George C. Foerstner Creator: McCormack, Mark H.; Foerstner, George C. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 14, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
273. Letter from Mark H. McCormack to George Carr Creator: McCormack, Mark H.; Carr, George 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
274. Letter from Mark H. McCormack to George Carr Creator: McCormack, Mark H.; Carr, George Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 20, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
275. Letter from Mark H. McCormack to George H. Love Creator: McCormack, Mark H.; Love, George H. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 17, 1978 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
276. Letter from Mark H. McCormack to George H. Love Creator: McCormack, Mark H.; Love, George H. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 28, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
277. Letter from Mark H. McCormack to George H. Love Creator: McCormack, Mark H.; Love, George H. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: May 6, 1978 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
278. Letter from Mark H. McCormack to George L. Murphy Creator: McCormack, Mark H.; Murphy, George L. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 8, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
279. Letter from Mark H. McCormack to George W. Ahl Creator: McCormack, Mark H.; Ahl, George W. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 27, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
280. Letter from Mark H. McCormack to George Walker Creator: McCormack, Mark H.; Walker, George Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 6, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives