Conference on water pollution problems in Europe, held in Geneva 22 February to 03 March 1961 
/ United Nations, Geneva 1961 
 - Geneva:     United Nations,    1961 
 - 468p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Subjects--Index Terms: </label>Water pollution 
<br/><br/><label>Universal Decimal Class. No.: </label>628.19(082.2)(4)  / K1.2