Schedules of reinforcement - Ferster, C.B. (Charles B.) 1922-; Skinner, B. F. (Burrhus Frederic) 1904-1990 (New York Appleton-Century-Crofts, Inc., 1957)
"Most of the work ... was carried out under contract to the Office of Naval Research under Contracts No. N5ori-07631 and M5ori-07656 with Harvard University ... between September 1, 1949 and June 30, 1955."
Keywords: Reinforcement (Psychology)