Columbia subject headings:
Harvard subject headings:
Canon law--Eastern churches
Canon law--Oriental Catholic churches
Canon law--Sources.
Catholic Church--Oriental rites--Government--History--Sources.
Catholic Church. Codex canonum ecclesiarum Orientalium.
Princeton subject headings:
Canon law--Early church, ca. 30-600.
Canon law--Eastern churches.
Canon law--Oriental Catholic churches.
Canon law--Sources.
Catholic Church--Oriental rites--Government--History--Sources.
Catholic Church--Oriental rites--Government--History.
Catholic Church. Codex canonum ecclesiarum Orientalium