Mechanization trends in metal and nonmetal mining as indicated by sales of underground loading equipment
By: by L.N. Plein, F.E. Berquist, and F.G. Tryon.
Contributors: Berquist, Frederick E.; Tryon, F. G. 1892-1940.; National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.); United States. Bureau of Mines.
Series: Mineral technology and output per man studies ;; report no. E-3
Publisher: Works Progress Administration, National Research Project and Dept. of the Interior, Bureau of Mines
Published: 1937
Place of publication: Philadelphia, Pa
Language: eng
Number of pages: 19
Subjects: Mineral industries -- United States.; Mining machinery.; Hoisting machinery.; Conveying machinery.
Notes: Includes bibliographical references.
"June 1937."