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A comprehensive handbook of all living and recently extinct mammals in the orders Pinnipedia (seals, sea lions, walrus), Cetacea (whales, dolphins, porpoises), and Sirenia (dugong, sea cow, manatees), plus the polar bear and the two salt-water otters... There are numerous illustrations, mostly black-and-white photographs, and extensive citations to the primary literature. The treatment is scientifically rigorous.(American Reference Books Annual)
Professional naturalists will find [these volumes] invaluable as a handy reference, and amateurs—at least those citizens alive to their earthly environment—should delight in finding so much fascinating information made so available and palatable.(Audubon)
A mine of information, for the specialist as well as for the casually interested... If you want to find out about a mammal, then here is the place to look.(New York Times)
Every mammalogist must have [these books], and those who profess a broad interest in the fauna of the world will want them.(Natural History)