Koehler and Wolf Permissible Flame Safety Lamps United States. Mining Enforcement and Safety Administration. Education and Training Branch Published: 1976 Total Pages: 40 Get eBook
Koehler and Wolf Permissible Flame Safety Lamps United States. Bureau of Mines. Division of Education and Training Services Published: 1972 Total Pages: 52 Get eBook
Construction, Care, and Use of Permissible Flame Safety Lamps Alva Britt Hooker Published: 1944 Total Pages: 20 Get eBook
Permissible Explosives, Mining Equipment, and Rescue Apparatus Approved Prior to January 1, 1925 John Edwards Crawshaw Published: 1925 Total Pages: 46 Get eBook
