Wallach, Luitpold..
Diplomatic studies in Latin and Greek documents from the Carolingian age /

. - Ithaca ; London  : Cornell University Press,  1977 
. - XIV, 396 p.  24 cm. 
<br/>К.: Бібліогр. : с. 355-378. 
<br/><label>  ISBN: </label>0-8014-1019-3