Christiansen, Eric.
The northern crusades: the Baltic and the Catholic frontier, 1100-1525 /
Eric Christiansen 
. - London : Basingstoke : Macmillan Press Ltd,  1980 
. - xv, 273 p.  map., ill.  22 cm. 
 - (New studies in medieval history )
<br/>К.: Бібліогр. : c. 254-259, Index 
<br/><label>  ISBN: </label>0-333-26243-3