TY  - BOOK
AU  - Lipsey,Richard G
AU  - Chrystal,K .Alec
TI  - An Introduction to positive economics / 
SN  - 0198774249
U1  - 330  
PY  - 1995///.
CY  - New York : 
PB  - Oxford University Press, 
KW  - Economics.
ER  -