61. Letter from Mark H. McCormack to F. 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: August 29, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
62. Letter from Mark H. McCormack to Frank Abramoff Creator: McCormack, Mark H.; Abramoff, Frank Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 2, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
63. Letter from Mark H. McCormack to Frank Adams Creator: McCormack, Mark H.; Adams, Frank Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: November 19, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
64. Letter from Mark H. McCormack to Fred Corcoran Creator: McCormack, Mark H.; Corcoran, Fred Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 7, 1969 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
65. 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: March 15, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
66. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 10, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
67. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 15, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
68. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 17, 1967 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
69. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: February 5, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
70. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 21, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
71. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 12, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
72. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: April 23, 1970 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
73. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: December 7, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
74. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 4, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
75. Letter from Mark H. McCormack to Gary Player Creator: McCormack, Mark H.; Player, Gary Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: January 22, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
76. Letter from Mark H. McCormack to George Blumberg Creator: McCormack, Mark H.; Blumberg, George Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: March 12, 1968 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
77. Letter from Mark H. McCormack to George Blumberg Creator: McCormack, Mark H.; Blumberg, George 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
78. Letter from Mark H. McCormack to George Simms Creator: McCormack, Mark H.; Simms, George Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: June 9, 1972 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
79. Letter from Mark H. McCormack to Gladstone Ntlabati Creator: McCormack, Mark H.; Ntlabati, Gladstone Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 3, 1971 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives
80. Letter from Mark H. McCormack to Gregory Peters Creator: McCormack, Mark H.; Peters, Gregory B. Format: Letters/Correspondence; Manuscripts Collection: Mark H. McCormack Papers, ca. 1920-2008 (bulk: 1957-2003) Date: September 2, 1975 Institution: University of Massachusetts Amherst Libraries Special Collections and University Archives