Encyclopedia of perennials / 
ed. in chief Graham Rice 
 - London :  Dorling Kindersley Limited,  2012 
 - 496 p. :  col. ill. ;  29 cm. 
<br/><br/> The head of the title " The Royal Horticultural Society" in set of 4 vols. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781409364689  £ 495.00 (set of 4 vols.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Perennials<br/>Perennials--Encyclopedias
<br/><br/><label>Dewey Class. No.: </label>635.93203