Columbia subject headings:
Arabian Peninsula--History.
Christianity and other religions--Islam.
Christianity--Arabian Peninsula.
Christians--Arabian Peninsula--History.
Islam--Relations--Christianity.
Harvard subject headings:
Arabian Peninsula--History.
Christianity and other religions--Islam
Christianity--Arabian Peninsula.
Christians--Arabian Peninsula--History.
Islam--Relations--Christianity
Princeton subject headings:
Arabian Peninsula--History.
Christianity and other religions--Islam.
Christianity--Arabian Peninsula.
Christians--Arabian Peninsula--History.
Islam--Relations--Christianity.