@book{14181,
	author = {Gundersen, L. C. S.},
	title = {Field studies of radon in rocks, soils, and water /},
	publisher = {C.K. Smoley,},
	year = {c1993.},
	address = {Boca Raton, Fla. :},
	note = {"U.S. Geological Survey research on the geology, geophysics, and geochemistry of radon in rocks, soils, and water."},
	url = {http://www.loc.gov/catdir/enhancements/fy0744/92038768-d.html}
}