Columbia subject headings:
Harvard subject headings:
Christianity--Philosophy
Liturgics--Orthodox Eastern Church.
Liturgies.
Orthodox Eastern Church--Liturgy.
Sacraments--Orthodox Eastern Church
Schmemann, Alexander, 1921-
Theology, Doctrinal--Orthodox Eastern Church.
Princeton subject headings:
Liturgics--Orthodox Eastern Church.
Orthodox Eastern Church--Liturgy.
Sacraments--Orthodox Eastern Church.
Shmeman, Aleksandr, 1921-1983.
Theology, Doctrinal--Orthodox Eastern Church.