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Geology and ore deposits of the Zimápán mining district, State of Hidalgo, Mexico,

By Simons, Frank S..
Washington, U.S. Govt. Print. Off., 1956 .
vi, 128 p. , Part of illustrative matter in pocket. 29 cm..

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Geology of the manganese deposits of Cuba /

By Simons, Frank S..
Washington, [D.C.] : U.S. G.P.O., 1958 .
xi, 289 p. : , "A summary report prepared in cooperation with the Dirección de Montes, Minas, y Aquas, Ministerio de Agricultura, under the auspices of the Interdepartmental Conference on Scientific and Cultural Cooperation with the American Republics, Department of State." | Includes index. 24 cm. +.

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Geology of the Klondyke quadrangle, Graham and Pinal Counties, Arizona,

By Simons, Frank S..
Washington, U.S. Govt. Print. Off., 1964 .
vi, 173 p. 29 cm..

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