"Otters: Ecology and Conservation" by C.F. Mason and S.M. Macdonald and "The Natural History of Otters" by P. Chaninv. 61560–561
Ralls, Katherine. 1986. [Book review] ""Otters: Ecology and Conservation" by C.F. Mason and S.M. Macdonald and "The Natural History of Otters" by P. Chanin." The Quarterly Review of Biology, 61, 560–561.