Columbia subject headings:
Harvard subject headings:
Ontology--Early works to 1800.
Substance (Philosophy)--Early works to 1800.
Thomas, Aquinas, Saint, 1225?-1274. De ente et essentia.
Princeton subject headings:
Ontology--Early works to 1800.
Substance (Philosophy)--Early works to 1800.
Thomas, Aquinas, Saint, 1225?-1274. De ente et essentia.