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144by Christian P. Dau, Edward J. Mallek, U. S. Fish, Wildlife Service, Migratory Bird ManagementGet access
Published 2007
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149by U. S. Fish, Wildlife Service, Thomas J. Hassler, Cornelius M. Sullivan, Gary R. SternGet access
Published 1991
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160by Nettleship, David N, Bartonek, James C, U.S. Fish and Wildlife Service, Natural Resources Council of AmericaGet access
Published 1979
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