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By: Taylor, Amy. - Caners, Richard. - Montana Natural Heritage Program. - United States. Bureau of Land Management. - Montana State Library.Edition:Publication info: Helena, Mont, Montana Natural Heritage Program, 2002, c2001Volume: 2002Series:Holding Institution: Montana State LibrarySubjects: Astragalus (Plants) Big Horn County (Mont.) Ecological surveys Ecology Montana Physarum Rosebud County (Mont.) SurveysBHL Collections: