Columbia subject headings:
Christianity and other religions--Islam.
Islam--Relations--Christianity.
Slomp, Jan, 1932-
Harvard subject headings:
Christianity and other religions--Islam
Islam--Relations--Christianity
Slomp, Jan, 1932-
Princeton subject headings:
Christianity and other religions--Islam.
Christianity--Europe--History--20th century.
Islam--Europe--History--20th century.
Islam--Relations--Christianity.
Slomp, Jan, 1932-