Columbia subject headings:
Catholic Church--Oriental rites.
Catholic Church--Relations--Orthodox Eastern Church.
Christianity and other religions--Islam.
Islam--Relations--Christianity.
Monophysites.
Orthodox Eastern Church--Relations--Catholic Church.
Harvard subject headings:
Catholic Church--Relations--Orthodox Eastern Church.
Christianity and other religions--Islam
Islam--Relations--Christianity
Monophysites.
Orthodox Eastern Church--Relations--Catholic Church.
Units of measurement.
Princeton subject headings: