Ochała, Grzegorz. <br/><br/>
Chronological systems of Christian Nubia / 
by Grzegorz Ochała. 
 - Warsaw :  University of Warsaw,  2011. 
 - vii, 364 p. :  maps, tables ;  24 cm. 
 -  Supplement ;  v.16 .
<br/><br/><label>ISBN: </label>9788392591955 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nubian languages--Texts.<br/>Christians--Nubia.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Nubia--Church history.<br/>Nubia--History--To 1500.