Data on natural organic substances in dissolved, colloidal, suspended-silt and -clay, and bed-sediment phases in the Mississippi River and some of its tributaries.
Denver, Colo. : U.S. Geological Survey :
> Mississippi River
River sediments > Mississippi River > Analysis.
Organic compounds > Environmental aspects.
Latest issue consulted: 1991-92.
Description based on: 1987-90.
ill., maps ;
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