Panning Gold for Fun and Profit [and two others]

Calif.: Melvin L. Kathan ; Distributed by Lapidary Journal, [Portland, Or.?], San Diego, 1970. Octavo, 32 pages: illustrations; 19 cm. Other two similar. All three are in institutional card bindings with original wraps preserved. All three ex-library with usual markings; else overall very good thus. . Hardcover.

Gold mining; gold panning, Diamonds, Precious metals and minerals. Abattage hydraulique, Gold mines and mining, Hydraulic mining, Or Mines et extraction, Prospecting, Prospection, gold mines, prospecting