Central and Eastern Europe :  Continuing transformation / 
Edited by Nikolai Genov. 
 - Sofia :  Regional and Global Development,  1998. 
 - 317 p. ;  il. 
<br/><br/><label>ISBN: </label>9548443058 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>32 (4-11) =20 "1998" CEN.