TY  - BOOK
AU  - Ladha Jagadish K.
AU  -  Hill James E. Duxbury John M.  Gupta Raj K.
TI  - Improving the Productivity and Sustainability of Rice-Wheat Systems : Issues and Impacts
SN  - 0-89118-150-4
U1  - 633.18 
PY  - 2003///
CY  - New Delhi
PB  - CIMMYT Research Afflicate
ER  -