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