biogeography

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The effect of glaciation and of the glacial period on the present fauna of North America
Samuel Hubbard Scudder

American Journal of Science September 1894, s3-48 (285) 179-187; DOI: https://doi.org/10.2475/ajs.s3-48.285.179
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On the relation between color and geographical distribution in birds as exhibited in melanism and hyperchromism
Robert Ridgway

American Journal of Science January 1873, s3-5 (25) 39-43; DOI: https://doi.org/10.2475/ajs.s3-5.25.39

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