Marine otters
Waller, G. (1996). Marine otters, in: Waller, G. et al. Sealife: a complete guide to the marine environment. pp. 431-433
In: Waller, G.; Burchett, M.; Dando, M. (1996). Sealife: a complete guide to the marine environment. Pica Press: Robertsbridge. ISBN 1-873403-26-7. 56 plates, 504 pp., more
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