TY  - BOOK
TI  - Statistics of crop responses to fertilizers․
PY  - 1966///
CY  - Rome, London
PB  - F.A.O. ։, H.M.S.O.
KW  - Fertilizers
KW  - Mathematical models
KW  - Economic aspects
KW  - Crop yields
N1  - Bibliography: p. [66]
ER  -