Columbia subject headings:
Art, French--20th century.
Art, German--20th century.
Art, Modern--20th century.
France--Foreign relations--Germany.
Germany--Foreign relations--France.
Harvard subject headings:
Art, French--20th century
Art, French--German influences
Art, German--20th century.
Art, German--French influences.
France--Relations--Germany.
Germany--Relations--France.
Princeton subject headings:
Art, French--20th century.
Art, German--20th century.
Art, Modern--20th century.
France--Foreign relations--Germany.
Germany--Foreign relations--France.