The National Library of Medicine Public Health Service publication National Library of Medicine (U.S.) National Library of Medicine (U.S.) Libraries, Medical [Rev. June 1967 Bethesda, Md. : National Library of Medicine, [1967] United States. Public Health Service, donor. Text Illustrations Portraits 16 p. nlm:nlmuid-0222664-bk 0222664 http://resource.nlm.nih.gov/0222664 English United States The National Library of Medicine believes this item to be in the public domain : https://creativecommons.org/publicdomain/mark/1.0/