TY  - BOOK
ED  - The International Rice Research Institute, 
TI  - Soil fertility: slide-tape instructional unit SR-4/ 
T2  - Rice production training series
AV  - S591 S65  
PY  - 0000///[Date of publication not identified]
CY  - aLos banos, Laguna
PB  - The International Rice Research Institute
KW  - Soil fertility
KW  - Soil science
ER  -