Columbia subject headings:
Harvard subject headings:
Mādhyamika (Buddhism)
Nāgārjuna, active 2nd century. Śūnyatāsaptatikārikā
Nāgārjuna, active 2nd century. Śūnyatāsaptikārikā.
Sunyata--Psychology.
Princeton subject headings:
Mādhyamika (Buddhism)--Early works to 1800.
Sunyata--Psychology.