

@article {5059,
	title = {The {Use} of {Microorganisms} as {Groundwater} {Tracers}: {A} review},
	journal = {Groundwater},
	volume = {20},
	year = {1982},
	pages = {142{\textendash}149},
	author = {Keswick, BH and Wang, D-S and C P Gerba}
}
