Columbia subject headings:
Harvard subject headings:
Medicine, Industrial--Germany--History--20th century.
Occupational physicians--Germany--Biography.
Valentin, H. (Helmut), 1919-2008.
Princeton subject headings:
Medicine, Industrial--Germany--History--20th century.
Occupational physicians--Germany--Biography.
Valentin, H. (Helmut), 1919-2008.