TY  - BOOK
AU  - Winters,L Alan 
AU  - Sapsford,David 
TI  - Primary commodity prices : economic models and policy
SN  - 0521385504
U1  - 338.22 
PY  - 1990///
CY  - Cambridge 
PB  - Cambridge University Press
KW  - commodity prices
KW  - economic models
ER  -