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Collis K. D. D. / Puget / Birds of North America Inc. / Verbeek N. A. / Bergmann Photographic Services Inc. / Wilson / Sinauer Assoc. Inc. / MathSoft Inc. / /
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North America / /
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Mexico / United States / Canada / United Kingdom / / /
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Natural Disaster / /
Facility
National History Museum of Los Angeles County / Pacific Wildlife Research Centre / Oregon State University / University of Minnesota / Patuxent Wildlife Research Center / Plant Health Inspection Service / Point Reyes Bird Observatory / Nash Hall / /
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food resources / Predictable food resources / /
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D. V / /
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Great Chain island / Puget Sound / San MartÃn Island / Great island / Chain island / e.g. island / river km / Chain Islets / Georgia / Sheepy Lake / Oregon coast / Study Area East Sand Island / Columbia River / Finger island / Rice Island / Mandarti island / Pacific coast / West Coast / Vancouver Island / Washington coast / Five island / Columbia River estuary / Mandarte Island / East Sand Island / Pacific Ocean / Five Finger island / Mullet Island / /
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Governor / /
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Minnesota / Alaska / Clatsop County / Maryland / Oregon / British Columbia / Washington / Victoria / Pennsylvania / California / Georgia / Massachusetts / Los Angeles County / /
Region
southern British Columbia / West Coast / southern California / /
Conservation Implications of the Large Colony of Double-crested Cormorants on East Sand Island, Columbia River Estuary, Oregon, U.S.A. CYNTHIA D. ANDERSON1,2, DANIEL D. ROBY1 AND KEN COLLIS3 1