@book{31,
	author = {Masters, Gilbert M  and  Ela, Wendell P},
	title = {Introduction to Environmental Engineering and Science},
	publisher = {Pearson Education},
	year = {2015,c2013},
	address = { New Delhi},
	edition = {3rd},
	note = {Balanced coverage of all the major categories of environmental pollution, with coverage of current topics such as climate change and ozone depletion, risk assessment, indoor air quality, source-reduction and recycling, and groundwater contamination.}
}