Columbia subject headings:
Harvard subject headings:
Christianity--Iraq.
Iran--Church history.
Iraq--Church history.
Persecution--History--Early church, ca. 30-600
Persecution--Iran--History.
Persecution--Iraq--History.
Princeton subject headings:
Christianity--Iran--History--To 640.
Christianity--Iraq--History.
Persecution--History--Early church, ca. 30-600.
Persecution--Iran--History.