TY  - BOOK
AU  - France, J.
AU  - Thornley, J. H. M.
TI  - Mathematical models in agriculture: : a quantitative approach to problems in agriculture and related sciences 
SN  - 0408108681
U1  - 338.10184 
PY  - 1984///
CY  - London
PB  - Butterworths
ER  -