Skinner, B. F. (Burrhus Frederic) 1904-1990 creator mixed material monographic eng 3 TLS (1979 March 15) from Skinner to John Norbutt stating that Albert Einstein made the greatest contributions to science in the twentieth century; first day cover (1963 October 14), autographed by Skinner, honoring the National Academy of Sciences; and autographed photograph of Skinner. Open to research. Psychologist. Full name: Burrhus Frederic Skinner. Collection material in English. Forms part of: Miscellaneous Manuscripts collection. Einstein, Albert 1879-1955 Norbutt, John Correspondence National Academy of Sciences (U.S.) First day covers (Philately) Science 20th century Psychologists mm 99006428 Open to research. DLC 991115 20260227111727.0 mm 99006428