TY  - BOOK
AU  - "Tokeo, Koyana and Chittana, Chammek."
TI  - Nitrogen application technology for tropical rice as determined by firld experiments using 15 N tracer technique
U1  - 631.816.84:633.18:621.089.85(213)(047.3)   L3 
PY  - 0000///Japan
CY  - 1973
PB  - "Trop.Agric. Res.Centre, Min.of Agric.& Forestry"
ER  -