Sharma, S D. Operationss research / by S.D. Sharma. - 8th rev ed / . - Meerut : Kedarnath Ramnath , 1988(rep.). - xxiv,584p. : ills.,tables.,figs. ; 21cm . NULL ISBN: Rs. 80.00 (Hb) Subjects--Index Terms: OPERATION RESEARCH Dewey Class. No.: 003 / SHA/O