Ruthenberg <br/><br/>
Farming Systems In The Trophic   Xxll,424p, 11.3tbls, 11.6figs,33plts. 

 - Oxford  Clarendon Press  1980 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ju18
<br/><br/><label>Dewey Class. No.: </label>Ju18  / L0