1. Chapskii, K. K. 1936. Morzh Karskogo Morya. [The walrus of the Kara Sea.] Trudy Arkticheskogo Instituta [Transactions of the Arctic Institute (Leningrad)] 67:1-124. (Translation from Russian by F. H. Fay and B. A. Fay 1993). Available from the National Marine Mammal Laboratory, Seattle, WA.