Sinking Methods and Costs for a Small Vertical Shaft with Steel Supports

Auteur : Clyde L. Brown, Fred A. Williams, Harry A. Schrecengost, Harry Daniel Kline, Harry M. Callaway, Norman E. Hanna, R. Ward Stahl, Robert L. Bolmer, Sara Jane Boles, William R. Devett

Date de publication : 1962

Éditeur : U.S. Department of the Interior, Bureau of Mines

Nombre de pages : 25