Dispersion and self-purification of pollutants in surface water systems 
a report by IHP working group 6.1., chief editors : P.G. Whitehead; T. Lack 
 - Paris  United Nations Educational, Scientific and Cultural Organization  1982 
 - 98 p.  ill. 
 - Technical papers in hydrology  23 .
<br/><br/> At head of title: "A contribution to the international Hydrological Programme" 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution