United States. Mines, Bureau of
United States. Dept. of the Interior. Bureau of Mines
United States. Dept. of Commerce. Bureau of Mines
United States. Department of Commerce. Bureau of Mines
U.S. Department of Commerce. Bureau of Mines
BOM
USBM
United States Department of the Interior Bureau of Mines
米國内務省鑛山局(ベイコク ナイムショウ コウザンキョク)