Contributor biographical information for Immortal river : the upper Mississippi in ancient and modern times / Calvin R. Fremling.
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Calvin Fremling is professor emeritus of biology at Winona State University and former aquatic ecologist at the Resources Studies Center, St. Mary's University of Minnesota. He has written numerous articles on the environment and the Mississippi River.
Library of Congress subject headings for this publication:
Mississippi River -- History.
Mississippi River Valley -- History.
Mississippi River -- Environmental conditions.
Mississippi River Valley -- Environmental conditions.