Metal-mine Accidents in the United States During the Calendar Year 1931

Auteur : Albert E. Keller, George Randolph Hopkins, George Samuel Rice, Hewitt Wilson, Kenneth Keith Kelley, Paul Gordon Guest, Percy Nicholls, William Waugh Adams, Harold Putnam Greenwald, L. E. Geyer, Henry C. Howarth, L. Chenoweth

Date de publication : 1932

Éditeur : U.S. Government Printing Office

Nombre de pages : 43