Columbia subject headings:
Islam--Relations--Christianity.
Religious pluralism.
Theology.
Harvard subject headings:
Christianity and other religions
Christianity and other religions--Islam
Cragg, Kenneth--Religion.
Islam--Relations--Christianity
Religious pluralism.
Theology
Princeton subject headings:
Christianity and other religions--Islam.
Church of England--Missions.
Cragg, Kenneth.
Islam--Relations--Christianity.
Missions to Muslims.