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Lead-Zinc deposits of the Boquira district states of Bahia, Brazil / by Robert F. Johnson.

by Johnson, Robert F, 1916-.

Material type: book Book Publisher: Washington : United States Government Printing Office, 1962Availability: Items available for loan: Biblioteca Aranzadi [Call number: 553.446(813.8) JOH] (1).
Geology of the lead-Zinc deposits in the Municipio de Januária state of Minas Gerais Brazil / by Jacques F. Robertson.

by ROBERTSON, Jacques F.

Material type: book Book Publisher: Washington : United States Government Printing Office, 1963Availability: Items available for loan: Biblioteca Aranzadi [Call number: 553.44(815.1) ROB] (1).
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