Tom Melius, Ann Runstrom, Byron Karns, & Mark Hove (U of M and Macalester College)

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Photo credit: © NatPar Collection / Alamy / Afripics
License: Licensed
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Keywords: croix, forest, historic, midwest, minnesota, mn, mussel, mussels, national, park, river, rivers, service, st., stcroix, usa, wi, wildlife, wisconsin