TY  - BOOK
AU  - Gupta, Prem Kumar
AU  - Hira, D. S.
TI  - operation research
U1  - RR X8(A):8:(B) M3G,N2 
PY  - 1993///
CY  - New Delhi
PB  - S. Chand
KW  - Operations research
N1  - Includes appendix, bibliography and index
ER  -