Nitrogen contamination sources in shallow ground water, Las Vegas Area, Nevada / 
by John W.Hess, Ralph O.Patt. 
 - Las Vegas :  University of Nevada System,  1977. 
 - 60 p. ;  28 cm. 
 - Technical report series H-W  n0.32 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrates.