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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Brelsford, Monica. - Gallatin National Forest (Agency : U.S.) - Montana Natural Heritage Program.
    Publication info: Helena, MT, Montana Natural Heritage Program, 1992]
    Holding Institution: Montana State Library
    Subjects: Aegolius funereus  Ecology  Flammulated owl  Gallatin National Forest  Habitat  Montana  Otus  Owls  
  2. By: Hendricks, Paul. - Custer National Forest (Agency : U.S.) - Montana Natural Heritage Program.
    Publication info: Missoula, MT, Montana Natural Heritage Program, [1996]
    Holding Institution: Montana State Library
    Subjects: Ashland Ranger District  Birds of prey  Custer National Forest  Custer National Forest (Mont. and S.D.)  Flammulated owl  Goshawk  Montana  United States