TY  - BOOK
AU  - Buffa Elwood S.
TI  - Operations management :  Problems and models   
T2  - Management and Administration
U1  - X:89A, K8;L.2 
PY  - 1960///
CY  - New York
PB  - John Wiley U. S. A.     
KW  - Production Management
N1  - Appendix p.725-51
ER  -