Symposium on the Productivity of Forest Ecosystems (1969 : Brussels). <br/><br/>
Productivity of forest ecosystems = Productivite des ecosystemes forestiers :  proceedings of the Brussels symposium organized by Unesco and the International Biological Programme (27-31 October 1969) = Actes du colloque ... / 
edited by P. Duvigneaud. 
 - Paris :  UNESCO,  1971. 
 - 707 p. : ill., maps. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Forest ecology.