- Ontology--Addresses, essays, lectures (2)
- Chain of being (Philosophy)--Addresses, essays, lectures (1)
- Hegel, Georg Wilhelm Friedrich, 1770-1831--Ontology--Addresses, essays, lectures (1)
- Husserl, Edmund, 1859-1938--Addresses, essays, lectures (1)
- Languages--Philosophy--Addresses, essays, lectures (1)
- Leibniz, Gottfried Wilhelm, Freiherr von, 1646-1716--Addresses, essays, lectures (1)
- Phenomenology--Addresses, essays, lectures (1)
- Philosophy, Italian--20th century--Addresses, essays, lectures (1)
- Philosophy, Modern--18th century--Addresses, essays, lectures (1)