TY  - BOOK
AU  - COLLEY JOHN L.,  LANDELL ROBERT D. AND FAIR R.R.
TI  - OPERATIONS PLANNING AND CONTROL. 
U1  - 658.155 COL/OPE 
PY  - 1979///
CY  - N. DELHI
PB  -  TATA MCGRAW HILL
ER  -