Columbia subject headings:
Heidegger, Martin, 1889-1976.
Ontology--History--20th century.
Ontology.
Harvard subject headings:
Heidegger, Martin, 1889-1976--Contributions in ontology.
Ontology--History--20th century.
Princeton subject headings:
Heidegger, Martin, 1889-1976--Contributions in ontology.