Ryan, J. G. <br/><br/>
Future challenges and opportunities for agricultural R&D in the semi-arid tropics 
/por J.G. Ryan and D.C. Spencer 
 - Andhra Pradesh, India :  International Crops Research Institute for the Semi-Arid Tropics,  2001. 
 - 79 p. ; gráps. ; mapas 
<br/><br/><label>ISBN: </label>9290664398 
<br/><br/><label>LCCN: </label>86378 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Trópicos.