Fecal coliform and Escherichia coli bacteria in the St. Croix National Scenic Riverway, summer 1999
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U.S. Dept. of the Interior, U.S. Geological Survey, Branch of Information Services [distributor]
2001
U.S. Dept. of the Interior, U.S. Geological Survey, Branch of Information Services [distributor]
1999
U.S. Dept. of the Interior, U.S. Geological Survey, Branch of Information Services [distributor]
2001