A primer on water quality 

 - Washington :   U. S. Government Printing Office,  1965. 
 - iii,27p.  : ill.   ; 26cm.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water<br/>Composition     <br/>Water composition<br/>Water pollution     <br/>Pollution
<br/><br/><label>LC Class. No.: </label>PAM TD370.U49