Columbia subject headings:
Architects--Germany--Congresses.
Architecture--Germany--History--20th century--Congresses.
Ostendorf, Friedrich, 1871-1915--Congresses.
Harvard subject headings:
Architects--Germany
Architecture--Germany--History--20th century
Ostendorf, Friedrich.
Princeton subject headings:
Architects--Germany.
Architecture--Germany--History--20th century.
Ostendorf, Friedrich.