Columbia subject headings:
German literature--20th century--History and criticism.
German literature--20th century--Themes, motives.
Masks in art.
Masks in literature.
Masks--Philosophy.
Harvard subject headings:
Art, German--20th century.
German literature--20th century--History and criticism
German literature--20th century--Themes, motives.
Masks in art.
Masks in literature.
Masks--Philosophy.
Philosophy, German--20th century.
Princeton subject headings:
German literature--20th century--History and criticism.
German literature--20th century--Themes, motives.
Masks in art.
Masks in literature.
Masks--Philosophy.