TY  - BOOK
AU  - Spencer Milton H
AU  -  Siegelman Louis
TI  - Managerial economics, decision making and forward planning
T2  - Irwin Series in economics
U1  - X9, K0/TD3 
PY  - 1960///
CY  - Illinois
PB  - Richard d irwin inc       
KW  - Industry Economics
ER  -