Signals in the animal world / by Dietrich Burkhardt, Wolfgang Schleidt [and] Helmut Altner, with the collaboration of Helmut Albrecht [and others] Translated by Kenneth Morgan. Burkhardt, Dietrich, Schleidt, Wolfgang. Altner, Helmut. Sense organs. Animal communication. Orientation. QP441 .B853 1968b 591.51 BUS Includes index. Bibliography: p. 148-150. New York : McGraw-Hill, c1967. c1967. 1968 Text 150 p. : eng engger