Columbia subject headings:
Judaism--Prayers and devotions.
Merkava--Criticism, Textual.
Merkava--Criticism, interpretation, etc.
Merkava.
Mysticism--Judaism.
Harvard subject headings:
Ascension of the soul--History of doctrines.
Maʻaśeh merkavah.
Merkava.
Prayer--Judaism
Princeton subject headings:
Merkava in rabbinical literature.
Mysticism--Judaism.
Prayer--Judaism.