The development of clay building materials industries in developing countries :  report of the interregional seminar on clay building materials industries; held in Copenhagen, 12-25 August 1968. 

 - New York :  UNIDO ,  1969 
 - Various pages :  ill. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Building construction
<br/><br/><label>Dewey Class. No.: </label>690/UNIDO