Thomas, Graham Stuart. <br/><br/>
Perennial garden plants or the modern florilegium  : a concise account of herbaceous plants, including bulbs, for general garden use 

 - 3 ed. 
 - Partland, Oregon :  Sagapress,  1990 
 - 463 p.  : ilus. 
<br/><br/><label>LCCN: </label>43577 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plantas ornamentales.<br/>Plantas perennes.
<br/><br/><label>Dewey Class. No.: </label>635.932  / T5 1990