@book{3471,
	author = {Aufmann, Richard N.},
	title = {College algebra and trigonometry},
	publisher = {Houghton Mifflin Company},
	address = {U.S.A},
	edition = {4th},
	url = {https://libgen.is/book/index.php?md5=457F09E3721EE7CB8B40017D4023255E}
}