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Subject: "Ecology"
Author/Creator: Is
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Geological Survey (U.S.)
Subject (Region): Is
Is Is Not
Mississippi River
Subject: Is
Is Is Not
Freshwater ecology

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1.
Taking the pulse of a river system research on the Upper Mississippi River System
Published
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2009]
Online
http://purl.access.gpo.gov/GPO/LPS114380
Location
Yale Internet Resource >> None
Format
Books / Online
2.
Taking the pulse of a river system, first 20 years
Published
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2006]
Online
http://purl.access.gpo.gov/GPO/LPS81266
Location
Yale Internet Resource >> None
Format
Books / Online