TY  - BOOK
AU  - Ruffin,Roy J.
AU  - Gregory,Paul R.
TI  - Principles of economics 
SN  - 0673155080
PY  - 1983///
CY  - Dallas 
PB  - Scott 
KW  - BI-BuBU
KW  - Economie
KW  - Principe
N1  - Index
ER  -