Youngs, F. O. <br/><br/>
Soil survey of the Tucson area, Arizona 

 - Washington :  Bureau of Chemistry and Soils,  (1936) 
 - 60 p.  ; ilus. ; mapas 
<br/><br/><label>LCCN: </label>55521 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Suelos--Arizona.