Columbia subject headings:
Authors, German--20th century--Biography--Exhibitions.
Ball-Hennings, Emmy, 1885-1948--Exhibitions.
Harvard subject headings:
Authors, German--20th century--Biography--Exhibitions
Ball-Hennings, Emmy, 1885-1948--Exhibitions.
Princeton subject headings:
Authors, German--20th century--Biography--Exhibitions.
Ball-Hennings, Emmy, 1885-1948--Exhibitions.