Ecokogy and integrated  farming systems 

 - New york  John wiley & sons  1995 
<br/><br/><label>ISBN: </label>0-471-95534-5 
<br/><br/><label>LC Class. No.: </label>632.96/LON 
<br/><br/><label>Dewey Class. No.: </label>632.96/LON