TY  - BOOK
AU  - Riggs James L.
TI  - Production systems :  Planning, analysis and contro   
T2  - Wiley series in Management
U1  - X:89A, L0;M1 
PY  - 1981///
CY  -  New Delhi 
PB  - Wiley Eastern India       
KW  - Production Management
ER  -