June 18, 1970, invoice from J.M. Edelstein to Ronald Johnson, AN, "Kansas univ.," 1pc

January 14, 1976, TLS from Thomas J. O'Donnell to Mr. Johnson, 1p

December 17, 1970, TLS from Alexandra Mason to Mr. Johnson, 1p

July 3, 1974, TLS from George J. Worth to Mr. Johnson, 1p

October 27, 1975, TLS from Thomas J. O'Donnell to Mr. Johnson, 1p

December 1, 1970, TLS from Alexandra Mason to Mr. Johnson, 1p

January 16, 2970, TLS from David W. Heron to Mr. Johnson, 1p

March 12, 1969, TLS from David W. Heron to Mr. Johnson, 1p

March 3, 1969, TLS from David W. Heron to Mr. Johnson, 2p

Undated, TL from [Ronald Johnson] to Mr. Heron, 2p, 1pc