Place-mining Possibilities in Montana: Pt. I. Methods and Appliances for Individual Operators. Pt. II. Placer-mining Districts in Montana. Pt. III. Reported Bar Placers on Missouri River Below Fort Benton, Issues 1-9
Charles Frederick Deiss · Charles Horace Clapp · Eugene Sheridan Perry · John Elmer Blixt · Oscar Aldrich Dingman · Montana Bureau of Mines and Geology
Jan 1929 · Montana School of Mines