Columbia subject headings:
Aesthetics.
Architects--Germany.
Architecture--Aesthetics.
Art--Philosophy.
Endell, August, 1872-1925.
Harvard subject headings:
Architecture--Germany--History--20th century
Architecture--Philosophy
Art nouveau--Germany.
Arts and crafts movement--Germany.
Design--Germany--Aesthetics--History--20th century.
Endell, August, 1872-1925--Friends and associates.
Endell, August, 1872-1925.
Princeton subject headings:
Endell, August, 1872-1925--Aesthetics.
Endell, August, 1872-1925--Criticism and interpretation.