Letters to the Editor: PDF OnlyMore ConfusionTockman, Melvyn S. M.D., Ph.D.Author Information Assistant Professor of Occupational and Respiratory Medicine, The Johns Hopkins University School of Hygiene and Public Health, Baltimore, MD 21205 Journal of Occupational Medicine: September 1982 - Volume 24 - Issue 9 - p 632-633 Free ©1982 The American College of Occupational and Environmental Medicine
