Mechanisms of animal discrimination learning / by N. S. Sutherland and N. J. Mackintosh. Sutherland, N. S. (Norman Stuart) Mackintosh, N. J. (Nicholas John), 1935- joint author. Animal intelligence. Discrimination learning. QL785 .S9 591.51 SUM includes bibliographical refeences and index. New York : Academic Press ; 1971. 1971. 1971 Text viii, 559 p. : eng