ECE Symposium on Problems Relating to Environment :  proceedings and documentation of the symposium / 
United Nations. Economic Commission for Europe. 
 - New York :  United Nations,  1971 
 - vii, 386 p. :  ill. ;  28 cm 
 - Economic commission for Europe .
 - Economic commission for Europe .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental policy
<br/><br/><label>Dewey Class. No.: </label>333.7  / ECE 1971