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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Carlson, Thomas M. - Wagner, Warren H.‏ (Warren Herbert),‏
    Type: Article
    In: Contributions from the University of Michigan Herbarium
    Volume: 15
    Date: 1982
    Page Range: 141--162
    Publication Info: Ann Arbor, University Herbarium, University of Michigan, 1939-