G.P. Verma 
Advancement of crops and monitoring of environment 
 - New Delhi  Today & Tomorrow`s Pri & Publishers  1988 
 - 418p 
G.P. Verma: Advancement of crops and monitoring of environment.  New Delhi.  Today & Tomorrow`s Pri & Publishers, 1988. 81-7019-310-9--(633VER)   
ENGLISH 
81-7019-310-9 
633  / VER