Columbia subject headings:
Thomas, Aquinas, Saint, 1225?-1274--Language.
Thomas, Aquinas, Saint, 1225?-1274. Scriptum super libros sententiarum.
Harvard subject headings:
Ontology.
Substance (Philosophy)
Thomas, Aquinas, Saint, 1225?-1274--Contributions in ontology.
Thomas, Aquinas, Saint, 1225?-1274--Language.
Thomas, Aquinas, Saint, 1225?-1274. Scriptum super IV libros Sententiarum. Liber 1.
Princeton subject headings:
Thomas, Aquinas, Saint, 1225?-1274--Language.
Thomas, Aquinas, Saint, 1225?-1274. Scriptum super libros sententiarum.