Cheetham, Nicolas Sir 1910-.
Keepers of the keys: a history of the Popes from St. Peter to John Paul II /
Nicolas Cheetham 
. - New York : Charles Scribner's Sons,  1982 
. - viii, 340, [32] p.  ill.  25 cm. 
<br/>К.: Бібліогр. : c. 313-315. 
<br/><label>  ISBN: </label>0-684-17863-X