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  1. Cliff-nesting raptors in the North and South Cave Hills, Harding County, South Dakota : 1997 inventory of active sites in 1996 /
    By: Hendricks, P. - Feigley, Pete. - Montana Natural Heritage Program. - United States.
    Publication info: Helena, Mont. :Montana Natural Heritage Program,1997.
    Contributed by: Montana State Library (
    Subjects: Birds of prey  Custer National Forest (Mont. and S.D.)  Golden eagle  Great horned owl  Harding County  Harding County (S.D.)  Merlin (Bird)  Nests  North Cave Hills (S.D.)  Prairie falcon  Red-tailed hawk  South Cave Hills (S.D.)  South Dakota  Surveys  
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  2. Impacts of logging on boreal birds in the mixedwood forest : final report /
    By: Hannon, Susan Jean, - Alberta. - Manning Diversified Forest Products Research Trust Fund.
    Publication info: [Manning, Alta.] :Alberta Environmental Protection,1998.
    Contributed by: University of Alberta Libraries (
    Subjects: Alberta  Barred owl  Birds  Effect of logging on  Great horned owl  Owls  Taiga ecology  
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  3. On an unnamed population of the great horned owl /
    By: Snyder, L. L. - Royal Ontario Museum.
    Publication info: [Toronto] :Royal Ontario Museum,1961.
    Contributed by: ROM - University of Toronto (
    Subjects: Great horned owl  
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