TY  - BOOK
AU  - Gupta,P.K.
AU  - Hira,D.S.
TI  - Operations Research An Introduction
U1  - 003 22
PY  - 1992///
CY  - New delhi
PB  - S.Chand 
KW  - Operations research
N1  - Includes bibliographical references and index
ER  -