Halecki, Oskar <br/><br/>
Pius II and Eastern Europe / 
Oskar Halecki. 
 - S.l. :  s.n.,  [19--]. 
 - 15 p. ;  28 cm. 
<br/><br/><label>Subjects--Index Terms: </label>Pius XII, Pope, 1876-1958. Catholic Church -- Eastern Europe.