@book{254888,
	author = {United States.},
	title = {Challenges and implications of EPA's proposed national ambient air quality standard for ground-level ozone and legislative hearing on S. 638, S. 751, and S. 640 :},
	publisher = {U.S. Government Publishing Office,},
	year = {2015.},
	series = {S. hrg. ;},
	address = {Washington :},
	note = {Shipping list no.: 2016-0196-M.}
}