Loomis, R. S. <br/><br/>
Crop ecology :  productivity and management in agricultural systems / 
R.S. Loomis, D.J. Connor. 
 - Cambridge [England] :  Cambridge University Press,  1992. 
 - xiv, 538 p. :  ill. 
<br/><br/> 137372 (ISBN 0521387760 - paperback) 
<br/><br/><label>ISBN: </label>052138379X (hardback) 
<br/><br/><label>LCCN: </label>93016343 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural ecology.<br/>Agricultural systems.