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The Appalachian region. Paleozoic Appalachia, or, The history of Maryland during Paleozoic time;

By Willis, Bailey,.
Baltimore, John Hopkins press, 1900 .
4 p.l., [23]-93 p. , At head of title: Maryland Geological survey. | "Special publication, volume IV, part I." 26 cm..

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The Potomac River basin; geographic history--rainfall and stream flow--pollution, typhoid fever, and character of water--relation of soils and forest cover to quailty and quantity of surface water--effect of industrial wates of fishes.

By Parker, Horatio N..
Washington, Gov't print. off., 1907 .
vi, 364, iii p. 23 cm..

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Index to the stratigraphy of North America /

By Willis, Bailey,.
Washington : U.S. Gov't. Print. Off., 1912 .
894 p. : , "List of contributors to the geologic map of North America and of the sources from which it has been compiled": p. 30-56. | Also published as House doc. 998, 61st Cong., 2d sess. 29 cm..

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