Dvornik, Francis 1893-1975.
The Slavs: their early history and civilization /
Francis Dvornik 
. - Boston : American Academy of Arts and Sciences,  1956 
. - 394 p.  map.  25 cm. 
 - (Survey of Slavic civilization  ; v. 2 )
<br/>К.: Бібліогр. : c. 341-371, Index