Guidebook of northern Mexico sonoran desert region 

 - Tucson :  University of Arizona,  1969 
 - 53 p.  ; mapas 
<br/><br/><label>LCCN: </label>19220 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Desierto de Sonora.<br/>Regiones áridas.