TY  - BOOK
AU  - Ruffin,RoyJ.
AU  - Gregory,Paul R.
TI  - Principles of microeconomics.
SN  - 0673158578
U1  - xxx 
PY  - 1983///
CY  - Dallas Texas,
PB  - Scott, Foresman and company
N1  - Includes glossary
ER  -