Columbia subject headings:
Cities and towns--Growth--Congresses.
Cities and towns--Morocco--Congresses.
Migration, Internal--Morocco--Congresses.
Morocco--Rural conditions--Congresses.
Harvard subject headings:
Cities and towns--Growth--Congresses
Cities and towns--Morocco--Congresses.
Migration, Internal--Morocco--Congresses.
Morocco--Rural conditions--Congresses.
Princeton subject headings:
Cities and towns--Growth--Congresses.
Cities and towns--Morocco--Congresses.
Migration, Internal--Morocco--Congresses.
Morocco--Rural conditions--Congresses.