By Walker Kristen A.   Davis Jay W.   Duffield Deborah A.   in Aquatic Mammals

ISSN:0167-5427|34|4|393-401

European Association for Aquatic Mammals‎(2008)‎

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By Zornetzer Heather R   Duffield Deborah A   in Canadian Journal of Zoology

ISSN:1480-3283|81|10|1755-1762

NRC Research Press‎(2003)‎

Access to resources Favorite 2.8335505