Proceedings and final report of the International Seminar on the improvement of housing conditions and the rehabilitation of historic centres 109-12 September 1990, IAA" Santo Kiriko" Creativity Centre, Assenorgrad, Bulgaria. 

 - Nairobi :  UNCHS (Habitat),  1990. 
 - 68 p. :  ill. ;  21 cm. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>9211311365 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Historic districts--Congresses.<br/>Historic preservation.