Benson, Lyman. <br/><br/>
The cacti of Arizona 

 - 3 ed. 
 - Tucson :  University of Arizona,  1969 
 - 218 p.  : ilus. 
<br/><br/><label>LCCN: </label>14858 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cactáceas.
<br/><br/><label>Dewey Class. No.: </label>583.47  / B4 1969