TY  - BOOK
AU  - Vrat, Prem
TI  - Productivity management :  a systems approach 
SN  - 978 81 7319 147 3
U1  - 658 515 VRA NO 4 
PY  - 1998///
CY  - London 
PB  -   Narosa publishing house
KW  - PRODUCTS MANAGEMENT
ER  -