Sandstra, H. G. <br/><br/>
A methodology for on-farm cropping systems research 

 - Manila :  International Rice Research Institute,  1981 
 - 147 p.  : ilus. 
<br/><br/><label>LCCN: </label>55973 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Investigacion--Asia.<br/>Sistemas de cultivo.
<br/><br/><label>Dewey Class. No.: </label>631.5  / Z3