Productivity of Forest Ecosystems 

 - UNESCO  France  1971 
 - 707p.  ILL.,Cht.,Fig and Table 
<br/><br/><label>Nat. Bib. No.: </label>3765 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Universal Decimal Class. No.: </label>634.16/.18  / PRO