Search U.S. government technical reports digitized or harvested by TRAIL.
Permissible mine equipment approved during 1957-58
The National Safety Competitions of 1948-58
The National safety competition of 1959
The National safety competition of 1960
The National Safety Competition of 1961
Installation and evaluation of precast concrete mine supports :a progress report
Design and development of precast concrete mine supports :a progress report
The National Safety Competition of 1962
Gas masks for respiratory protection against phosphine
Respiratory protective devices approved by the Bureau of Mines as of October 1, 1965
An analysis of 44 recent fatal accidents with front-end loaders
Low-temperature performance of compressed-oxygen closed-circuit breathing apparatus