Public domain
Dr. John W. Miller, (left) pathologist, and Dr. R.R. Sayers, medical officer in charge of office of Industrial Hygiene, U.S. Public Health Service
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Subjects
Credit lineDr. John W. Miller, (left) pathologist, and Dr. R.R. Sayers, medical officer in charge of office of Industrial Hygiene, U.S. Public Health Service. 1936-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.