A mechanical panning technique for separation of fine-grained gold and other heavy minerals
By: by Brian L. English, George A. Desborough, and William H. Raymond
Contributors: Desborough, George A; Raymond, William H; Geological Survey (U.S.)
Series: Open-file report -- 87-364; U.S. Geological Survey open-file report -- 87-364
Publisher: U.S. Dept. of the Interior, Geological Survey
Published: 1987
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Gold ores; Heavy minerals
Notes: Distributed to depository libraries in microfiche

Bibliography: leaf 9

Microfiche. [Denver, Colo. : U.S. Geological Survey, 198 7]. 1 microfiche ; 11 x 15 cm