Tillman, David <br/><br/>
Uncounted energy :  the present contribution of renewable resources 

<br/><br/>bibliogr. p. 51-54 
<br/><br/><label>ISBN: </label>0126912505 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ressources renouvelables<br/>Energie<br/>Sylviculture<br/>Agriculture