Hansen, Richard. <br/><br/>
Perennials and their garden habitat / 
Richard Hansen and Friedrich Stahl ; translated by Richard Ward. 
 - 4th ed. 
 - Cambridge ;  New York :  Cambridge University Press,  1993. 
 - xii, 450 p. :  ill. (some col. ) ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0521351944 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Perennials.<br/>Perennials--Habitat.<br/>Landscape gardening.
<br/><br/><label>LC Class. No.: </label>SB434  / H35 1993