Respiratory protection : an employer's manual

Published:: Cincinnati, Ohio : Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Technical Services, 1978.
Washington, D.C. : For sale by the Supt. of Docs., U.S. G.P.O.
Physical Description:: v, 92 pages : illustrations ; 22 cm.
Additional Creators:: National Institute for Occupational Safety and Health. Division of Technical Services