Boericke, William F.
Prospecting and operating small gold placers / by William F. Boericke - 2nd ed. - New York : Wiley, 1936. - xi, 145 p. : ill. ; 19 cm.
0471085146
Gold mines and mining.
Placer deposits.
622.3422
Prospecting and operating small gold placers / by William F. Boericke - 2nd ed. - New York : Wiley, 1936. - xi, 145 p. : ill. ; 19 cm.
0471085146
Gold mines and mining.
Placer deposits.
622.3422