TY  - BOOK
AU  - S.S. Virmani
AU  -  B.C. Viraktamath C.L. Casal R.S. Toledo M.T. Lopez J.O. Manalo  International Rice Research Institute
TI  - Hybrid rice breeding manual
U1  - 633.18 
PY  - 1997///
CY  - Los Banos
PB  - International Rice Research Institute
ER  -