Water quality surveys :  a guide for the collection and interpretation of water quality data / 
prepared by the IHD-WHO Working Group on Quality of Water 
 - Paris :  UNESCO,  1978 
 - 350 p., 1 fold. leaf of plates :  ill. (some col.) ;  24 cm. 
 - Studies and reports in hydrology  23 .
<br/><br/><label>ISBN: </label>9231014730 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality--Measurement