TY - BOOK ID - 146258452 TI - Comparison of gas masks, hose masks, and oxygen breathing apparatus AU - Katz, S. H. AU - Bourquin, J. J. AU - United States. PY - 1923 PB - [Washington, D.C.] : Department of the Interior, Bureau of Mines, DB - UniCat KW - Gas masks. KW - Respirators (Medical equipment) KW - Mine accidents. UR - https://www.unicat.be/uniCat?func=search&query=sysid:146258452 AB - ER -