Fennell, John.
The crisis of medieval Russia, 1200-1304 /
John Fennell 
. - London : New York : Longman,  1983 
. - xiii, 206 p.  maps, schem.  23 cm. 
 - Longman history of Russia .
<br/>К.: Бібліогр. : c. 189-194, Index 
<br/><label>  ISBN: </label>0-582-48150-3