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Washington[Govt. print. off.]1912. | Library of Congress

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Washington, Govt. print. off., 1904.

Madison, Wis.,The State,1911. | Library of Congress

[Washington, D.C.]: U.S. Dept. of Agriculture, Bureau of Soils, [1902].

Washington: Govt. Print. Off., 1917.

Washington: Govt. Print. Office, 1912.

[Washington, Govt. print. off.]1909.

Washington, Govt. print. off., 1904

1902 book by Maryland Geological Survey