TY  - BOOK
ED  - Food and Agriculture Organization of the United Nations.
TI  - Statistics of crop responses to fertilizers
U1  - 631.81 
PY  - 1966///
CY  - Rome
PB  - Food and Agricultural Organization of the United Nations
KW  - Fertilisers and manures
KW  - Research
KW  - Fertilizers, Crops responses of
ER  -