Owens, J. Diversity and Community of Being in St. Thomas Aquinas. Toronto: Pontifical Institute of Mediaeval Studies, 1960. 
43 pp. offprint in printed wrappers, previous owner's small ink name stamp in a couple of places, rest clean. 6 x 9 inches. Very good. Paperback.
An offprint from Mediaeval Studies, Volume XXII, 1960.