Manganese and iron deposits of Morro do Urucum, Mato Grosso, Brazil /

by Dorr, John Van N. (John Van Nostrand), 1910-
Published 1945

Physiographic, stratigraphic and structural development of the Quadrilátero Ferrífero Minas Gerais, Brazil /

by Dorr, John Van N. (John Van Nostrand), 1910-
Published 1969

Geology and ore deposits of the Itabira district, Minas Gerais, Brazil /

by Dorr, John Van N. (John Van Nostrand), 1910-, Barbosa, Aluizio Licinio de Miranda
Published 1963

Nickel deposits of Bohemia Basin and vicinity, Yakobi Island, Alaska /

by Reed, John Calvin, 1905-1993, Dorr, John Van N. (John Van Nostrand), 1910-
Published 1942

Geology and ore deposits of the Itabira district, Minas Gerais, Brazil /

by Dorr, John Van N. (John Van Nostrand), 1910-, Barbosa, Aluizio Licinio de Miranda
Published 1963

Manganese deposits of the Serra do Navio district, Territory of Amapá, Brazil /

by Dorr, John Van N. (John Van Nostrand), 1910-, Park, Charles F., Jr., 1903-1990, Paiva, Glycon de
Published 1949