@book{7992,
	author = {Asthana, D K and Asthana, Meera},
	title = {Environment: problems and solutions},
	publisher = {S.chand and company,},
	year = {2010.},
	address = {New Delhi :},
	url = {http://www.amazon.com/exec/obidos/ASIN/chopaconline-20}
}