Document is "Excerpts from Letters of Heads of State Commenting on Proceedings of Pugwash Conference of International Scientists on Biological and Chemical Warfare". The date on the cover page ranges from 24 to 30 Oct. 1959.

Leaders include Canada's John G. Diefenbaker, Great Britain's Harold Macmillan, Cuba's Fidel Castro, Mexico's Adolfo Lopez Mateos, Ghana's Kwame Nkrumah, Hungary's Ferenc Munnich and many others, each commenting on the Pugwash Conference.