@book{57538,
	author = {Gupta, P. K. and Hira, D. S.},
	title = {Operations Research /},
	publisher = {S Chand and Company Limited,},
	year = {2022.},
	address = {New Delhi :},
	edition = {7th ed.},
	note = {Includes bibliographical references (p. 1489-1498) and index.}
}