TY  - BOOK
AU  - Edward J.Ray
AU  - Carolyn E. Johnson 
AU  - Thomas J.Kniesner
TI  - Principle of Microeconomics: Student Study Guide/ 
SN  - 0697010406
PY  - 1987///
CY  - Dubuque , IOWA
PB  - WM.C. Brown publishers. 
KW  - Microeconomics
ER  -