Glacial period

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Epochs and stages of the glacial period
Warren Upham

American Journal of Science April 1895, s3-49 (292) 305-306; DOI: https://doi.org/10.2475/ajs.s3-49.292.305
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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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The northern part of the Connecticut Valley in the Champlain and terrace periods
Warren Upham

American Journal of Science December 1877, s3-14 (84) 459-470; DOI: https://doi.org/10.2475/ajs.s3-14.84.459

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