TY  - BOOK
AU  - HANNAFORD,John
AU  - HEIBRONER,Robert L.
TI  - A programmed guide to The economic problem
SN  - 0132269287
PY  - 1972///
CY  - Englewood Cliffs
PB  - Prentice-Hall
KW  - Economics
KW  - Programmed instruction
ER  -