Geology and ore deposits of the Atacocha District, Departamento de Pasco, Peru /
Johnson, Robert F.
Instituto Nacional de Investigación y Fomento Mineros (Peru)
Washington, [D.C.] : U.S. G.P.O.,
1955.
"Prepared in cooperation with the Instituto Nacional de Investigación y Fomento Mineros, Ministerio de Fomento y Obras Publicas under the auspices of the Foreign Operations Administration, United States Department of State."
Includes bibliography and index.
Geology
Ore deposits