Dawson, Elmer Yale,  1918-1966. <br/><br/>
How to know the cacti :  pictured keys for determining the native cacti of the United States and many of the introduced species / 
W Yale Dawson 
 - Dubuque, Iowa :  W. C. Brown Co.,  c1963 
 - v, 158 p. :  ill. ;  22 cm. 
 - Pictured key nature series .
 - Pictured key nature series .
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cactus--Identification.--United States
<br/><br/><label>Dewey Class. No.: </label>583.560973  / DAH 1963