TY  - BOOK
ED  - IRRI
TI  - Symposium on cropping systems research and development for the asian rice farmer
U1  - Fil. 630.7 Sy6 
PY  - 1977///
CY  - Laguna
PB  - The International Rice Research Institute
KW  - Crop rotation
KW  - Cropping system
ER  -