Seegers. Stephan <br/><br/>
The training and visit system and the links between rice reseach and extention in the matara distric of sri lanka/ 
Seegers. Stephan 
 -  ISNAR  1990 
 - vi,10pg  pbk 
<br/><br/><label>LC Class. No.: </label>S 191. 5 S3 1990