TY  - BOOK
AU  - Sillanpaa,Mikko
ED  - Food and Agriculture Organization of the United Nations.
TI  - Micronutrient assessment at the country level: an international study 
SN  - 9251029555
PY  - 1990///
CY  - Rome
PB  - FAO
KW  - Soil fertility
KW  - Soil-Surveys
KW  - Trace elements
KW  - Micronutrient fertilizers
ER  -