. . . . . "Mining Industry of the United States of America. Supplementing exhibit ... at the Brazil Centennial Exposition ... 1922-1923. By Dr. Thomas T. Read. [With illustrations and a map.]" . . "Mining Industry of the United States of America. Supplementing exhibit ... at the Brazil Centennial Exposition ... 1922-1923. By Dr. Thomas T. Read. [With illustrations and a map.]"@en . . .