Columbia subject headings:
Cabala--History and criticism.
Hekhalot literature--History and criticism.
Merkava.
Religious calendars--Judaism--History.
Harvard subject headings:
Cabala--History and criticism.
Hekhalot literature--History and criticism.
Merkava.
Religious calendars--Judaism--History.
Princeton subject headings:
Hekhalot literature.
Merkava.
Mysticism--Judaism.