Publications of the Iowa Geological and Water Survey.

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Submissions from 1930

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Studies of Iowa Coals, Iowa Geological Survey

Submissions from 1929

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Analyses of Iowa Coals, Iowa Geological Survey

Submissions from 1844

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Report of a Geological Exploration of Part of Iowa, Wisconsin, and Illinois, made under Instructions from the Secretary of the Treasury of the United States in the Autumn of the Year 1839, with Charts and Illustrations, David Dale Owen, John Locke, and Ebenezer Phillips