Columbia subject headings:
Apologetics--Early works to 1800.
Consultationes Zacchaei et Apollonii.
Monastic and religious life--Early works to 1800.
Harvard subject headings:
Apologetics--Early works to 1800
Christian heretics--Early works to 1800.
Monastic and religious life--Early works to 1800.
Monasticism and religious orders--History--Early church, ca. 30-600--Early works to 1800.
Salvation--Christianity--History of doctrines--Early church, ca. 30-600
Salvation--Early works to 1800
Theology--Early works to 1800
Theology--History--Early church, ca. 30-600
Princeton subject headings:
Apologetics--Early works to 1800.
Christian heretics--Early works to 1800.
Monastic and religious life--Early works to 1800.
Salvation--Early works to 1800.
Theology--Early works to 1800.