The investiture controversy: issues, ideas, and results /
edited by Karl F. Morrison 
. - New York : Huntington : Robert E. Krieger publishing company,  1978 
. - xi, 132 p.  ill., map.  23 cm. 
 - (The European problem studies )
<br/>К.: Бібліогр. : c. 131-132 
<br/><label>  ISBN: </label>0-88275-634-6