Singh, S. <br/><br/>
Report of a workshop on cropping systems research in Asia:    International rice research institute / 
by Shivraj Singh 
 -  IRRI  1982 
 - 754p.  Hbk 
<br/><br/><label>ISBN: </label>971104076X 
<br/><br/><label>LC Class. No.: </label>SB185.R4