Slijper, E. J. 1907-1968. Whales / [electronic resource] / E. J. Slijper ; translated by A. J. Pomerans.. — 2d [Engl.] ed., with a new foreword, concluding chapter, and bibliography / by Richard J. Harrison.. — Ithaca, N.Y. : : Cornell University Press,, 1979.. — 511 p. : : ill. ; 25 cm.