Harper, W. G. <br/><br/>
Soil survey of the Salt River Valley area, Arizona, 

 - Washington :  Bureau of Chemistry and Soils,  1926 
 - 55 p.  : ilus. ; mapa 
<br/><br/><label>LCCN: </label>73915 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Arizona.