TY  - BOOK
AU  - Lipsey, Richard M.
AU  - Forrest, David.
TI  - Workbook For Seventh Edition Of An Introduction to Positive Economics
SN  - 0297795570
AV  - HB171.515LIP 
PY  - 1989///
CY  - London.
PB  - Weidenfeld and nicolson.
N1  - Includes bibliographical references and index
ER  -