Pontifical Institute of Mediaeval Studies. Mediaeval Studies Volume XX. Etienne Gilson Anniversary Studies. Toronto: Pontifical Institute of Mediaeval Studies, 1958. First Edition. 
Brown stiff printed wrapper, 6 1/2 x 10 inches, 315 clean pp. Very good. Paperback.
A collection of essays by the members of the Institute, including Owens, Haring, Raftis, Shook, Maurer, Kennedy, Muckle, Hanrahan, McLaughlin, Eschmann, Ryan, and O'Donnell. Some essays in Latin.