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Folder 1: “The California dredger as an instrument of conservation” by Wendell P. Hammon, correspondence regarding mining operations, and lists of gold dredging companies operating in California.
Folder 2: Letter of rejection for publication in California journal of mines and geology / State of California, Department of Natural Resources, Division of Mines from Olaf P. Jenkins, Chief, State of California Department of Natural Resources Division of Mines. August 23, 1955.
Folder 3: photocopies of contents of Folders 1 and 2.