E. J. Kloos and S. J. Pearce, Respiratory Protective Devices Approved by the Bureau of Mines as of October 16, 1958, Information Circular 7885 (1958)

The Bureau of Mines' list of approved respiratory protective devices as of October 16, 1958, by E. J. Kloos and S. J. Pearce of its Branch of Health Research in Pittsburgh, printed by the Government Printing Office in 1959. Like the earlier lists it covers breathing apparatus, gas masks, supplied-air respirators, dust, fume and mist respirators and chemical-cartridge respirators, with the makers' names and addresses and a bibliography. This is a library copy with cataloging notes written on the title page.