Empires besieged : time frame AD 200-600 /
by the editors of Time-Life Books 
. - Alexandria ; Virginia  : Time-Life Books,  1988 
. - 176 p. : ill.  28 cm. 
 - ((Time frame) )
<br/>К.: Бібліогр. : с. 174-176. 
<br/><label>  ISBN: </label>0-8094-6416-0 ; 0-8094-6417-9