TY  - BOOK
AU  - Bingham, Robert C.
TI  - Economic concepts: : a programmed approach
SN  - 0070449635
U1  - 330.077 
PY  - 1987///]
CY  - New York
PB  - McGraw-Hill
KW  - Economics
KW  - Programmed instruction
KW  - lcgft
ER  -