Prospecting and operating small gold placers /
Boericke, William Fay, 1884-
Prospecting and operating small gold placers / by William F. Boericke. - 2nd ed. - New York : John Wiley, 1936. - xi, 145 p. : ill.
Gold mines and mining.
TN421 / .B72 1936
622.34
Prospecting and operating small gold placers / by William F. Boericke. - 2nd ed. - New York : John Wiley, 1936. - xi, 145 p. : ill.
Gold mines and mining.
TN421 / .B72 1936
622.34