Columbia subject headings:
Language and languages--Philosophy.
Logic.
Thought and thinking.
Harvard subject headings:
Abelard, Peter, 1079-1142. Tractatus de intellectibus.
Language and languages--Philosophy--Early works to 1800.
Logic--Early works to 1800
Psychology--Early works to 1850
Thought and thinking--Early works to 1800.
Princeton subject headings:
Language and languages--Philosophy.
Logic.
Thought and thinking.