Birzea, Casar comp. <br/><br/>
Educational research in five European Socialist Countries : A survey 1970-1972 :  :Bulgaria, Hungary, Poland, Romania, Yougoslavia 

 - Hamburg  Unesco Institute for Education  1973 
 - 198p. 
<br/><br/><label>Dewey Class. No.: </label>RR 370.7804 EDU