Vankat, John L.,  1943-. <br/><br/>
The natural vegetation of North America :  an introduction / 
John L. Vankat. 
 - New York :  John Wiley & Sons,  1979. 
 - 261 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>0471017701 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--Ecology.--North America<br/>Plant communities--North America.