Proceedings and documentation of the symposium organized by the United Nations Economic Commission for Europe and held from 2 to 15 May 1971 in Prague (Czechoslovakia)  with a study tour to the region of Ostrava (Czechoslovakia) and Katowice (Poland). 

 - New York  United Nations  1971. 
 - vii, 386 p.  illus.  29 cm. 
<br/><br/> "United Nations publication. Sales number: E.71.II.E.6." 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>72191103  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental engineering--Congresses.<br/>Environmental policy--Congresses.
<br/><br/><label>LC Class. No.: </label>TD5  / .E2 1971 
<br/><br/><label>Dewey Class. No.: </label>333.7/2/094