Wursig, Bernd Encyclopedia of marine mammals / edited by Bernd Wursig ; J.G.M.Thewissen and Kit M.Kovacs - Third edition - London : Elsevier, 2018 - xxxi, 1157 pages : illustrations ISBN: 9780128043271 Subjects--Topical Terms: MARINE MAMMALS LC Class. No.: QL 713.2 Enc