Handbook of Metaphysics and Ontology.
Edited by Jans Burkhardt and Barry Smith.
Philosophia, 1991.
2 volumes.
Over 470 articles on historical and contemporary metaphysicians (e.g. Aristotle, Hegel, Fodor), schools (e.g. Arabic, Encyclopaedists, Port-Royal), periods (e.g. Greek, Renaissance), and concepts (e.g. logic, plenitude).