Columbia subject headings:
Architecture--Belgium--Periodicals.
Architecture--Europe--Periodicals.
Architecture--Periodicals.
City planning--Belgium.
City planning--Periodicals.
Harvard subject headings:
Architecture--Europe--20th century--Periodicals
City planning--Belgium--Periodicals.
Princeton subject headings:
Architecture--Belgium--Periodicals.
City planning--Belgium--Periodicals.
Periodicals.