Columbia subject headings:
Descartes, René, 1596-1650.
Knowledge, Theory of.
Ontology.
Harvard subject headings:
Descartes, René, 1596-1650--Knowledge, Theory of.
Descartes, René, 1596-1650--Ontology.
Knowledge, Theory of--History--17th century.
Ontology--History--17th century.
Princeton subject headings:
Descartes, René, 1596-1650--Knowledge, Theory of.
Descartes, René, 1596-1650--Ontology.
Knowledge, Theory of--History--17th century.
Ontology--History--17th century.