Risk and uncertainty as factors in crop improvement research / 
R.E. Evenson ... [et al.] 
 - Manila :  International Rice Research Institute,  1978. 
 - 19 p. 
 - IRRI research paper series ;  no. 15 .
<br/><br/> Cover title. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crops--Mathematical models.