U.S. Gupta 
Crop improvement. Vol 1 Physiology attributes 
 - New Delhi  Oxford and IBH Publishing Co.Pvt.Ltd  1992 
 - 267p 
U.S. Gupta: Crop improvement. Vol 1 Physiology attributes.  New Delhi.  Oxford and IBH Publishing Co.Pvt.Ltd, 1992. 81-204-0595-1--(581.1GUP)   
ENGLISH 
81-204-0595-1 
581.1  / GUP