TY  - BOOK
AU  - Lumsden,Keith G.
AU  - Attiyeh,Richard
AU  - Bach,George Leland
TI  - Microeconomics: a programmed book 
PY  - 1966///
CY  - Englewood Cliffs
PB  - Prentice-Hall
KW  - Microeconomics
KW  - Programmed instruction
ER  -