@book{27810,
	author = {Taha.H.R},
	title = {Operations research an introduction},
	publisher = {Prentice Hall },
	address = {New Delhi},
	edition = {7th},
	url = {https://libgen.is/book/index.php?md5=E3AA251DD5BF0EAF1D5005717559F374}
}