Columbia subject headings:
Boufeldja, Zaïd.
Sahara--Description and travel.
Harvard subject headings:
Christianity and other religions--Islam
Ex-nuns--Sahara.
Islam--Relations--Christianity
Lagrue, Andrée, 1908-
Missionaries--Sahara.
Princeton subject headings:
Christianity and other religions--Islam.
Ex-nuns--Sahara.
Islam--Relations--Christianity.
Lagrue, Andrée, 1908-
Missionaries--Sahara.