TY  - BOOK
AU  - Gupta,Prem Kumar
AU  - Hira,D.S.
TI  - Operations research
SN  - 8121902819
U1  - 003 22
PY  - 1998///
CY  - New delhi
PB  - S. Chand and company.l
KW  - Operations research
N1  - Includes bibliographical references and index
ER  -