Uranium at Morro do Vento Serra de Jacobina Brazil /

by White, Max Gregg 1916 -, White, Max Gregg 1916 -
Published 1964

Radioactive manganese occurrences in the lower Rio Itapicurú Valley, Bahía, Brazil /

by Haynes, Donald Duane 1928-, Haynes, Donald Duane 1928-, Mau, Henry, White, Max Gregg 1916 -
Published 1958