The Mechanical Reduction of Gold Ores by the Crawford Mill (manufactured by the Mechanical Gold Extractor Co.)
Author: Mechanical Gold Extractor Co. (New York)
All names: Mechanical Gold Extractor Co. (New York) [organisation]
Place of publication: New York
Country of publication: United States of America
Publisher: Mechanical Gold Extractor
Date of publication: 1893
Physical description: 32 pages (8°)
Languages: English