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

 - London ;  New York :  Academic Press,  1975. 
 - ix, 261 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0126565503 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural systems.<br/>Biology, Economic.
<br/><br/><label>Dewey Class. No.: </label>630 ACA 1975 A064 Or.