@book{6213,
	author = {Hass, Joel  and  Weir, Maurice D;},
	title = {Thomas Calculus.},
	publisher = {Pearson,},
	year = {2018},
	address = {Uttar Pradesh :},
	edition = {14th},
	url = {https://www.amazon.com/Thomas-Calculus-14Th-Hass-Heil/dp/9353060419}
}