Survey of Cypripedium calceolus, U.S.D.I. Bureau of Land Management, Butte District, Garnet Resource Area, Montana Heidel, Bonnie L. creator Montana Natural Heritage Program. contributor text book Helena, MT Montana Natural Heritage Program [1992?] 1992
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ENG "Order No. E950-A1-0006." Bureau of Land Management Cypripedium Garnet Resource Area Montana Rare plants United States 584.4 https://www.biodiversitylibrary.org/bibliography/45852 39305775 10.5962/bhl.title.45852 Mt