Hastings, James Rodney. <br/><br/>
The changing mile  : an ecological study of vegetation change cult time in lower mile of an arid and semi arid region 

 - Tucson, Arizona :  University of Arizona,  1965 
 - 317 p.  : ilus. 
<br/><br/><label>LCCN: </label>68180 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botánica--Regiones áridas.<br/>Desiertos--Ecología.<br/>Regiones áridas--Botánica.
<br/><br/><label>Dewey Class. No.: </label>551.45  / H38