Quality of surface waters of the United States, 1969
Subtitle: Parts 4 and 5. St. Lawrence River Basin and Hudson Bay and Upper Mississippi River Basins.
Series: U.S. Geological Survey water-supply paper -- 2144
Publisher: U.S. Government Printing Office
Published: 1974
Place of publication: Washington, DC
Language: eng
Number of pages: 367
Subjects: Water-supply -- United States.; Water -- Composition.
Notes: Prepared in cooperation with the States of Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, North Dakota, New York, Ohio, South Dakota, Vermont, Wisconsin, and with other agencies.

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