RT Book T1 The doctrine of being in the Aristotelian "Metaphysics": a study in the Greek background of mediaeval thought A1 Owens, Joseph A2 Gilson, Etienne 1884-1978 LA English PP Toronto PB Pontifical Institute of Mediaeval Studies YR 1951 UL https://www.ixtheo.de/Record/246883227 CN B434 K1 Aristotle : Metaphysics K1 Ontology