@book{13659,
	author = {Sengupta, M.},
	title = {Mine environmental engineering /},
	publisher = {CRC Press,},
	year = {c1990.},
	address = {Boca Raton, Fla. :},
	note = {includes index},
	url = {http://www.loc.gov/catdir/enhancements/fy0744/89007126-d.html}
}