Russell, J. C. 1900-.
Late ancient and medieval population /
J.C. Russell 
. - Philadelphia : American Philosophical Society,  1958 
. - 152 p.  tab.  30 cm. 
 - Transactions of the American Philosophical Society. New series  v. 48 ; pt. 3 .
<br/>К.: Бібліогр. в підрядк. прим., Index