Columbia subject headings:
Harvard subject headings:
Dentistry--Germany--History--20th century--Congresses.
Dentists--Germany--History--20th century--Congresses.
Germany--Politics and government--1933-1945
National socialism and medicine--Congresses.
Princeton subject headings:
Dentistry--Germany--History--20th century.
Dentists--Germany--History--20th century.
Germany--Politics and government--1933-1945.
National socialism and medicine.