Scherr, Sara J. <br/><br/>
Pilot analysis of global ecosystems:  agroecosystems / 
Stanley Wood, Kate Sebastian, Sara J. Scheer 
 - Washington, DC :  International Food Policy Research Institute,  2000 
 - xii, 110 p. :  ill. ;  28 cm. 
<br/><br/>Refrences: p. 87-94 
<br/><br/><label>ISBN: </label>1569734577