TY  - BOOK
AU  - Ruffin, Roy J.
AU  - Gregory, Paul R.
TI  - Principles of economics
SN  - 0-673-99488-0
U1  - BCir. 330 6th ed.
PY  - 1996///
CY  - --United State of America
PB  - Addison-Wesley Educational Publisher
N1  - Includes bibliographical references and index
ER  -