Preston-Mafham, Ken. <br/><br/>
500 cacti  species and varieties in cultivation 
Ken Preston-Mafham. 
 - Richmond Hill, Ont. :  Firefly Books,  c2007. 
 - 528 p. :  col. ill. ;  17 cm. 
<br/><br/> Includes bibliographical references (p. 518) and index. 
<br/><br/><label>ISBN: </label>9781840139495 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cactus