1967
Bjornerstedt January 2, 1967 - SIPRI International Institute for Peace and Conflict Research invitation to join BW group.
Johnson Petition February 14, 1967 - Petition to President Johnson from scientists concerned about weakening restraints on chemical and biological weapons
Horowitz May 18,1967 - Meselson letter to Horowitz at Melpar, Inc. re: BW test detection
Simmons July 28, 1967 - Meselson letter to Howard Simmons at the Washington Post re: Arms and Influence (Schelling)
Kaplan August 24, 1967 - Meselson letter to Kaplan re: Yemen gas attacks, further detailed in The Yemen (1969).
Kaplan September 11, 1967 - Kaplan letter to Meselson re: BW test detection.
Harris October 30, 1967 - Letter to Eugenie Harries, responding to her August 31 letter to Bernard Feld re: CBW
Humphrey November 1, 1967 - invitation to a meeting "Chemical and Biological Warfare in an Age of Nuclear Stalemate" in connection with the inauguration of the John D. Bernal Peace Library.