Stebbins, G. Ledyard,  1906- <br/><br/>
Flowering plants :  Evolution above the species level / 
G. Ledyard Stebbins. 
 - Cambridge, Mass. :  Belknap Press of Harvard University Press,  1974. 
 - xviii, 399 p. :  ill. ;  24 cm. 
 - 582/.13/0438 .
<br/><br/> Includes index. 
<br/><br/>Bibliogr.: p. [356]-380. 
<br/><br/><label>ISBN: </label>0674306856 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Evolution<br/>Angiosperms--Evolution
<br/><br/><label>Dewey Class. No.: </label>582/.13/0438