Murphy, Roy E. Adaptive processes in economic systems / [by] Roy E. Murphy, Jr. - New York : Academic Press, 1965. - xvi, 209 p. : ill. ; 24 cm. - Mathematics in science and engineering ; v. 20 . - Mathematics in science and engineering ; v. 20. . Includes bibliographies. Subjects--Topical Terms: Economics--Mathematical models. Dewey Class. No.: 330.01519 / MUA 1965