Columbia subject headings:
Authors, German--19th century--Pictorial works.
Thoma, Ludwig, 1867-1921--Pictorial works.
Harvard subject headings:
Authors, German--19th century--Pictorial works.
Thoma, Ludwig, 1867-1921--Pictorial works.
Princeton subject headings:
Authors, German--20th century--Biography.
Thoma, Ludwig, 1867-1921.