TY  - BOOK
AU  - Morgan Mary S. Ed.
AU  -  Morrison Margaret Ed.
TI  - Models as mediators :  Perspectives on natural and social science
T2  - Ideas in context
U1  - X:(B8), N9 
PY  - 1999///
CY  - Cambridge
PB  - Cambridge Uni. press     
KW  - ECONOMICS
ER  -