TY  - BOOK
AU  - Chiou- Shuang Yan
TI  - Introduction to input- output economic
T2  - Principles of economics series
U1  - X:89P:(B), K9 
PY  - 1969///
CY  - New York
PB  - Holt Rinehart and Winston U S A   
KW  - Work Study
ER  -