Approach 

 - Washington, D.C. :  United Staes Government Printing Office,  1980- 
 - v. ;  24 cm. 
<br/><br/> Library has v.25, no.12 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water chemistry
<br/><br/><label>Dewey Class. No.: </label>359.94