@article {49941,
	title = {Cross-site comparisons of precipitation and surface water chemistry},
	year = {2011},
	keywords = {cross-site comparisons, global change, long term trends, precipitation, surface water chemistry},
	author = {Charles T. Driscoll and Peter M. Groffman and John M Blair and Ariel E. Lugo and C. Laney and Debra C. Peters}
}
