Mineral facts and problems, 1970 / U. S. Bureau of Mines. - Washington, U.S. : Dept. of the Interior, Bureau of Mines, 1970 - 1291 p. : ill. ; 26 cm. - Ito Bulletin 650 .


Mineral industries--United States.
Mines and mineral resources--United States.

622 / USBM 1970 Ref.