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Hiller F. S. L. J. &. N., .Introduction To Operations Research .-9th. : TMH, New Delhi.
Hiller F S Liberman,G J & Nag,Bodhibrata, .Introduction To Operations Research .-9th. : TMH, New Delhi.
Hiller F S Liberman,G J & Nag,Bodhibrata, .: TMH, New Delhi. .
