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The Birds of Churchill, Manitoba
Vol 23, Page 1
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The life history of the rufescent wood-chuck, Marmota monax rufescens Howell
Vol 23, Page 85
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The Gerrinae of the Western Hemisphere (Hemiptera)
Vol 23, Page 179
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A systematic study of a collection of mammals from southern Arizona
Vol 23, Page 241
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A miocene microfauna and flora from the Atrato River, Colombia, South America
Vol 23, Page 275
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The Tertiary formations of the Uinta Basin, Utah
Vol 23, Page 357
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List of species and description of new material from the Duchesne river Oligocene, Uinta Basin, Utah
Vol 23, Page 373
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New Duchesne river Rodents and a preliminary survey of the Adjidaumidae
Vol 23, Page 391
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Mytonolagus, a new Leporine genus from the Uinta Eocene series in Utah
Vol 23, Page 399
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Errata
Vol 23, Page xii