341. Letter from Mark H. McCormack to H. Lawrence Parker Creator: McCormack, Mark H.; Parker, H. Lawrence Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 16, 1980 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
342. Letter from Mark H. McCormack to Hans Thornqvist Creator: McCormack, Mark H.; Thornqvist, Hans Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 15, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
343. Letter from Mark H. McCormack to Harvey K. Butzky Creator: McCormack, Mark H.; Butzky, Harvey K. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 8, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
344. Letter from Mark H. McCormack to Heinz Riehl Creator: McCormack, Mark H.; Riehl, Heinz Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: October 20, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
345. Letter from Mark H. McCormack to Henry Saperstein Creator: McCormack, Mark H.; Saperstein, Henry G., 1918-1998 Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 6, 1993 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
346. Letter from Mark H. McCormack to Herb McDonald Creator: McCormack, Mark H.; McDonald, Herb 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
347. Letter from Mark H. McCormack to Hunter M. A. Carr Creator: McCormack, Mark H.; Carr, Hunter M. A. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 26, 1990 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
348. 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: February 29, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
349. 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: September 6, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
350. 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
351. 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: April 13, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
352. Letter from Mark H. McCormack to J. E. Hoy Creator: McCormack, Mark H.; Hoy, J. E. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 14, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
353. Letter from Mark H. McCormack to J. J. Burgdoerfer Creator: McCormack, Mark H.; Burgdoerfer, J. J. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: July 17, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
354. Letter from Mark H. McCormack to J. J. Starke Creator: McCormack, Mark H.; Starke, J. J. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 9, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
355. Letter from Mark H. McCormack to J. Kevin Murphy Creator: McCormack, Mark H.; Murphy, J. Kevin Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 6, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
356. Letter from Mark H. McCormack to J. M. S. deVicuna Creator: McCormack, Mark H.; deVicuna, J. M. S. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 15, 1973 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
357. Letter from Mark H. McCormack to J. P. Evans Creator: McCormack, Mark H.; Evans, J. P. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 14, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
358. Letter from Mark H. McCormack to J. Richard Ryan Creator: McCormack, Mark H.; Ryan, J. Richard Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 5, 1977 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
359. Letter from Mark H. McCormack to J. T. Trutter Creator: McCormack, Mark H.; Trutter, J. T. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 14, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
360. Letter from Mark H. McCormack to Jack Mulcahy Creator: McCormack, Mark H.; Mulcahy, Robert Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 11, 1974 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives