Columbia subject headings:
Morocco--Civilization--Congresses.
Morocco--Relations--Netherlands--Congresses.
Netherlands--Relations--Morocco--Congresses.
Harvard subject headings:
Domestic relations--Morocco--Congresses.
Domestic relations--Netherlands--Congresses.
Moroccans--Netherlands--Social conditions--Congresses.
Morocco--Civilization--Congresses.
Morocco--Education--Congresses.
Morocco--Emigration and immigration--Congresses.
Morocco--Relations--Netherlands--Congresses.
Netherlands--Education--Congresses.
Netherlands--Emigration and immigration--Congresses.
Netherlands--Relations--Morocco--Congresses.
Princeton subject headings:
Morocco--Civilization--Congresses.
Morocco--Relations--Netherlands--Congresses.
Netherlands--Relations--Morocco--Congresses.