Renaissance and renewal in the twelfth century /
edited by Robert L. Benson, Giles Constable with Carol D. Lanham 
. - Cambridge : Harvard University Press,  1982 
. - xxx, 781 p.  ill.  24 cm. 
<br/><br/> From a conference held under the auspices of UCLA Center for Medieval and Renaissance Studies, Harvard University Committee on Medieval Studies, 26-29 November 1977, Cambridge, Massachusetts ; Commemorating the contribution by Charles Homer Haskins.
<br/><label>  ISBN: </label>0-674-76085-9