Simmonds, Norman W.,  1914- <br/><br/>
Farming systems research :  a review / 
Norman W. Simmonds. 
 - Washington, DC :  World Bank,  1985. 
 - xii, 97 p. ;  28 cm. 
 - World Bank technical paper ;  43 .
<br/><br/>Includes bib. references. 
<br/><br/> Open. 
<br/><br/><label>ISBN: </label>0821305662 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural systems--Research.<br/>Agriculture--Research--On-farm.<br/>Agricultural systems--Tropics.