TY  - BOOK
AU  - Ruffin, Roy,
AU  - Gregory, Paul R.
TI  - Principles of economics
SN  - 067318871X
PY  - 1988///
CY  - Glenview, Ill.
PB  - Scott, Foresman
KW  - Economics
N1  - Includes bibliographies and index
ER  -