Reconnaissance of mercury and methylmercury in the St. Croix River and selected tributaries, Minnesota and Wisconsin, July 2000 through October 2001
Payne GA and Hansen DS. 2003. Reconnaissance of mercury and methylmercury in the St. Croix River and selected tributaries, Minnesota and Wisconsin, July 2000 through October 2001. 2003-4223. U.S. Geological Survey Water-Resources Investigations Report