TY  - GEN
AU  - CLARK, J. R.
AU  - VESETH, M.
TI  - Economics: Cost and Choice
SN  - 0-15-518830-5
U1  - 330 CLA 
PY  - 1987///
CY  - New York
PB  - Harcourt Brace Jovanovich
ER  -