Columbia subject headings:
Spiritual life--Zen Buddhism--Early works to 1800.
Zen Buddhism--Doctrines--Early works to 1800.
Harvard subject headings:
Spiritual life--Zen Buddhism--Early works to 1800.
Zen Buddhism--Doctrines--Early works to 1800
Princeton subject headings:
Spiritual life--Zen Buddhism--Early works to 1800.
Zen Buddhism--Doctrines--Early works to 1800.