Simple treatment methods for sulfide gold and silver ores /
by A.L. Engel.

APA Citation

Engel, A. L. (Abraham L.). (1951). Simple treatment methods for sulfide gold and silver ores. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines.

MLA Citation

Engel, A. L. (Abraham L.). Simple Treatment Methods for Sulfide Gold And Silver Ores. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, 1951.

Warning: These citations may not always be complete (especially for serials).