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

APA Citation

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

MLA Citation

Engel, Abraham L. Simple Treatment Methods for Oxide 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).