Spedding, C.R.W.  <br/><br/>
The biology of agricultural systems  (Book) 

 - London  Academic Press  1975 
 - 261 p.   24 cm. 
<br/><br/><label>ISBN: </label>0126565503 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural systems Biology,Economic
<br/><br/><label>Universal Decimal Class. No.: </label>63:57 SPE  / 11326