Ashby, W. Ross 1903-1972. An introduction to cybernetics. Ross, Ashby W. - New York, J. Wiley, 1956. - 295 p. illus. 23 cm. LCCN: 56012972 Subjects--Topical Terms: Cybernetics. LC Class. No.: Q175 .A84 Dewey Class. No.: 501