Placer mining in Alaska :
methods and costs at operations using hydraulic and mechanical excavation equipment with nonfloating washing plants /
by B.I. Thomas [and others].

APA Citation

Thomas, B. I., Kerns, W. H., Wolff, E., Cook, D. J. (1959). Placer mining in Alaska: methods and costs at operations using hydraulic and mechanical excavation equipment with nonfloating washing plants. Washington, D. C.: United. States. Bureau of Mines.

MLA Citation

Thomas, Bruce I, William H Kerns, Ernest Wolff, and Donald J Cook. Placer Mining In Alaska: Methods And Costs At Operations Using Hydraulic And Mechanical Excavation Equipment With Nonfloating Washing Plants. Washington, D. C.: United. States. Bureau of Mines, 1959.