TY  - BOOK
AU  - Bingham,Robert C.
TI  - Economic concepts: a programmed approach 
SN  - 0070449368 (pbk.) :
AV  - HB171.5 .B52 1981
U1  - 330.02 BIN 19
PY  - 1981///
CY  - New York
PB  - McGraw-Hill
KW  - Economics
KW  - Programmed instruction
ER  -