by Albert E. Russell, surgeon, Roy R. Jones, passed assistant surgeon, J.J. Bloomfield, sanitary engineer, Rollo H. Britten, senior statistician, Lewis R. Thompson, Assistant Surgeon General, United States Public Health Serivce ; prepared by direction of the Surgeon General
by Robert H. Flinn, passed assistant surgeon, Waldemar C. Dreessen, passed assistant surgeon, Thomas I. Edwards, technical editor, Edward C. Riley, assistant public health engineer, J.J. Bloomfield, sanitary engineer, R.R. Sayers, senior surgeon, United States Public Health Service, and John F. Cadden, M.D., director, S.C. Rothman, engineer, Bureau of Industrial Hygiene of the West Virginia State Health Department ; from the Division of Industrial Hygiene, National Institute of Health ; prepared by direction of the Surgeon General