Koren, Henry J. An introduction to the science of metaphysics. - St. Louis, Herder 1955 - 291 p. 21 cm. LCCN: 55010922 Nat. Bib. No.: GB56-5871 Subjects--Topical Terms: Metaphysics. LC Class. No.: BD131 / .K6 Dewey Class. No.: 110