TY  - BOOK
AU  - Challen D. W.
AU  -  Hagger A. J.
TI  - Macroeconomic systems :  Construction, validation a   
SN  - 0 333 31084 5
U1  - X:72:(B), M3 
PY  - 1983///
CY  - London
PB  - Macmillan UK         
KW  - Macroeconomics
ER  -