Columbia subject headings:
Heidegger, Martin, 1889-1976.
Husserl, Edmund, 1859-1938.
Harvard subject headings:
Heidegger, Martin, 1889-1976
Husserl, Edmund, 1859-1938
Ontology--History--20th century.
Self-knowledge, Theory of--History--20th century.
Princeton subject headings:
Heidegger, Martin, 1889-1976.
Husserl, Edmund, 1859-1938.