Benson, Lyman David,  1909- <br/><br/>
The Cacti of the United States and Canada / 
Lyman Benson ; with line drawings by Lucretia Breazeale Hamilton 
 - Stanford, California :  Stanford University Press,  1982 
 - ix, 1044 p. :  ill. (some col.) ;  29 cm. 
<br/><br/>Bibliography : p. 987-1008 
<br/><br/><label>ISBN: </label>0804708630 
<br/><br/><label>LCCN: </label>73-080617 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cactus--United States<br/>Cactus--Canada<br/>Botany--United States<br/>Botany--Canada