Concentration tests on various base-metal ores /
by A.L. Engel.
APA Citation
Engel, A. L. (1952). Concentration tests on various base-metal ores. [Pittsburgh, PA]: U.S. Dept. of the Interior, Bureau of Mines.
MLA Citation
Engel, Abraham L. Concentration Tests On Various Base-metal Ores. [Pittsburgh, PA]: U.S. Dept. of the Interior, Bureau of Mines, 1952.
Warning: These citations may not always be complete (especially for serials).