01255cam a22002771 4500 gs 56000164 DLC 20260227111404.0 761028s1956 dcuab b f000 0 eng c gs 56000164 (OCoLC)2536838 U.S. Geol. Survey Library NhD ISS DLC QE75 .P9 no. 284 QE203.H3 S5 I 19.16:284 Simons, Frank S. (Frank Stanton), 1917- Geology and ore deposits of the Zimápán mining district, State of Hidalgo, Mexico, by Frank S. Simons and Eduardo Mapes V. Prepared in cooperation with the Instituto Nacional para la Investigación de Recursos Minerales of Mexico, under the auspices of the Technical Cooperation Administration of the Dept. of State. Washington, U.S. Govt. Print. Off., 1956. vi, 128 p. illus., maps, (part fold., part col.) 29 cm. Geological Survey (U.S.). Professional paper 284 Part of illustrative matter in pocket. Bibliography: p. 123-124. Geology Mexico Hidalgo (State). Mines and mineral resources Mexico Hidalgo (State). Mapes Vázquez, Eduardo, joint author. 29065 29065