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USGS · 5210541

Demography of eastern population tundra swans, Cygnus columbianus columbianus

J. Bart·R. Limpert·S. Earnst·W. Sladen·J.E. Hines·T. Rothe
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J. Bart, R. Limpert, S. Earnst, W. Sladen, J.E. Hines, T. Rothe. 1991. Demography of eastern population tundra swans, Cygnus columbianus columbianus. https://pubs.usgs.gov/publication/5210541

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