Plant species and plant communities :  proceedings of the International Symposium held at Nijmegen November 11-12, 1976, in honour of Professor Dr. Victor Westhoff on the occasion of his sixtieth birthday / 
edited by Eddy van der Maarel & Marinus J. A. Werger 
 - The Hague :  W. Junk bv Publishers,  1978 
 - 178 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>9061935911 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant communities--Congresses<br/>Plant populations--Congresses