UNITED STATES DEPARTMENT OF THE INTERIOR J. A. Krug, Secretary GEOLOGICAL SURVEY W. E. Wrather, Director
Bulletin 954-F
MANGANESE DEPOSITS OF MEXICO
BY PARKER D. TRASK AND JOSE RODRIGUEZ CABO, JR.
Prepared in cooperation with the UNIVERSIDAD NACIONAL DE MEXICO, INSTITUTO DE GEOLOGIA SECRETARIA DE LA ECONOMIA NACIONAL DIRECCI6N GENERAL DE MINAS Y PETR6LEO and COM1TE DIRECTIVO PARA LA INVESTIGATION DE LOS RECURSOS MINERALES DE MEXICO under the auspices of INTERDEPARTMENTAL COMMITTEE ON SCIENTIFIC AND CULTURAL COOPERATION, DEPARTMENT OF STATE
Geologic Investigations in the American Republics, 1946 (Pages 209-316)
UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1948
For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D. C. Price 35 ;cents
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