@book{8377,
	author = {Douglas, Evan J.},
	title = {Managerial economics},
	publisher = {Prentice Hall },
	address = {New Delhi},
	edition = {4th},
	url = {https://libgen.is/book/index.php?md5=D90B3D04E3A6BF122C7623ACF5FF6B21}
}