Hem, John David,   1916- <br/><br/>
Study and interpretation of the chemical characteristics of natural water /  
by John D. Hem. 
 - 2nd ed. 
 - Washington :   U.S. Govt. Print. Off.,   1970. 
 - xiv, 363 p.  il. 
 - United States. Geological Survey. Water-supply paper ;   1473 .
 - Geological Survey water-supply paper ;  1473. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Química da água.
<br/><br/><label>Dewey Class. No.: </label>546.22