TY  - BOOK
AU  -  Brian Duignan.
TI  - Economics and economic systems 
SN  - 9781615308927
PY  - 2013///
CY  - New York
PB  - Britannica Educational Pub
KW  - Duignan, Brian.
KW  - Economics
N1  - Includes bibliography, glossary and index
ER  -