Columbia subject headings:
Aristotle. Categoriae.
Metaphysics--Early works to 1800.
Philosophy, Medieval.
Porphyry, approximately 234-approximately 305. Isagoge.
Predicate (Logic)--Early works to 1800.
Harvard subject headings:
Metaphysics--Early works to 1800
Philosophy, Medieval.
Porphyry, approximately 234-approximately 305. Isagoge.
Predicate (Logic)--Early works to 1800.
Princeton subject headings:
Porphyry, approximately 234-approximately 305. Isagoge.