TY  - BOOK
AU  - Ponnamperuma, F. N.
ED  - International Rice Research Institute.
TI  - Behavior of minor elements in paddy soils
T2  - IRRI research paper series
PY  - 1977///
CY  - Manila
PB  - International Research Institute
KW  - Elementos menores
KW  - Suelos arroceros
ER  -