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  1. Aquatic invertebrates of the Yellowstone River Basin, Montana / by Robert L. Newell ; conducted by the Water Resources Division, Montana Department of Natural Resources and Conservation ... for the Old West Regional Commission.
    By: Newell, Robert L. - Montana. - Montana. - Old West Regional Commission.
    Publication info: Helena, Mont. :The Commission,1977.
    Contributed by: Montana State Library (archive.org)
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