Columbia subject headings:
Casel, Odo, 1886-1948.
Mysticism--Catholic Church.
Sacraments--History of doctrines--20th century.
Sacrifice--Christianity.
Harvard subject headings:
Casel, Odo, 1886-1948
Mysticism--Catholic Church
Sacraments--History of doctrines--20th century.
Sacrifice--Christianity
Princeton subject headings: