Prospecting and Operating Small Gold Placers
Illustrated with b/w drawings & photos. New York: John Wiley & Sons, Inc., 1933. 12mo. Black flexible cloth, stamped in yellow. xi, 136 p. 1st edition. [89601]
Illustrated with b/w drawings & photos. New York: John Wiley & Sons, Inc., 1933. 12mo. Black flexible cloth, stamped in yellow. xi, 136 p. 1st edition. [89601]
Illustrated with b/w drawings & photos. New York: John Wiley & Sons, Inc., 1936. 12mo. Black flexible cloth, stamped in yellow. xi, 144 p. 2nd edition. [100853]
Illustrated with b/w drawings & photos. New York: John Wiley & Sons, Inc., 1936. 12mo. Black flexible cloth, stamped in yellow. xi, 144 p. 2nd edition. [101683]