Columbia subject headings:
Descartes, René, 1596-1650. Principia philosophiae--Indexes.
Harvard subject headings:
Descartes, René, 1596-1650. Principia philosophiae--Concordances.
Descartes, René, 1596-1650. Principia philosophiae--Indexes.
Philosophy--Indexes.
Princeton subject headings:
Descartes, René, 1596-1650. Principia philosophiae--Concordances.
Descartes, René, 1596-1650. Principia philosophiae--Indexes.
Philosophy--Indexes.