Columbia subject headings:
City planning--Austria--Congresses.
City planning--Germany--Congresses.
National socialism--Austria--Congresses.
National socialism--Congresses.
Harvard subject headings:
City planning--Austria--Congresses.
City planning--Germany--Congresses.
National socialism--Austria--Congresses.
National socialism--Congresses
Princeton subject headings:
City planning--Austria--Congresses.
City planning--Germany--Congresses.
National socialism--Austria--Congresses.
National socialism--Germany--Congresses.