Columbia subject headings:
Harvard subject headings:
Gardens--Design--Germany--History--Congresses.
Gardens--Germany--History--Congresses.
Günther, Harri, Dr.
Landscape architecture--Germany--History--Congresses.
Princeton subject headings:
Gardens--Germany.
Günther, Harri, Dr.
Günther, Harri, Dr.--Bibliography.
Landscape architecture--Germany.