Wulf, Maurice de 1867-1947.
History of mediv̆al philosophy /
by Maurice de Wulf ; translated by Ernest C. Messenger 
. - 3d English edition based on the 6th French edition 
. - London : New York : Toronto : Longmans, Green and co.,  1935- 
. - v.  22 cm. 
<br/> V. 1. From the beginnings to the end of the twelfth century  <br/>  V. 2. The thirteenth century  <br/>  <br/>