The concept of Heresy in the Middle Ages (11th-13th)  proceedings 
The International conference Louvain, May 13-16, 1973 ; edited by W. Lourdaux and D. Verhelst 
 - Leuven  Leuven University Press  1976 
 - viii, 232 p.  25 cm. 
 - Mediaevalia Lovaniensia  series 1, studia 4 .
<br/><br/><label>ISBN: </label>9061860431  PND 65.25 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heresy--Historyes<br/>Christian heresies--History--Middle Ages, 600-1500es
<br/><br/><label>Dewey Class. No.: </label>273.09401