Mechanization Trends in Metal and Nonmetal Mining as Indicated by Sales of Underground Loading Equipment

Auteur : A. Porter Haskell, Andrew Vincent Corry, Frederick Gale Tryon, Harry S. Kantor, Leopold Nicholas Plein, Frederick E. Berquist, Geoffrey A. Saeger, Oscar Edward Kiessling

Date de publication : 1937

Éditeur : Works Progress Administration, National Research Project and Department of the Interior, Bureau of Mines

Nombre de pages : 133