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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Pammel, L. H. (Louis Hermann), - Weems, Julius Buel, - Bain, Harry Foster,
    Publication info: Des Moines : Iowa Geological Survey, 1901-1904 [] i.e. 1905]
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library