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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hopkins, A. D. (Andrew Delmar), - United States. Department of Agriculture. - United States. Bureau of Entomology.
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, Bureau of Entomology, 1910
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Bark beetles  Forest insects  Spruce bark beetles
  2. By: Holsten, Edward H. - United States. Forest Service.
    Edition: Rev. Nov. 1999.
    Publication info: [Washington, D.C.?], U.S. Dept. of Agriculture, Forest Service, [1999]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Canada  Diseases and pests  Internet resource  Spruce bark beetles  Trees  United States  
  3. By: Holsten, Edward H. - Thier, R. W., - Schmid, J. M. - United States. Department of Agriculture. - United States. Forest Service.
    Edition: [Rev. Feb. 1991].
    Publication info: [Washington, D.C.?], U.S. Dept. of Agriculture, Forest Service, 1991
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Canada  Diseases and pests  Spruce bark beetles  Trees  United States  
  4. By: Holsten, Edward H. - Thier, R. W., - Schmid, J. M. - United States. Department of Agriculture. - United States. Forest Service.
    Edition: Rev. July 1989.
    Publication info: [Washington, D.C.?], U.S. Dept. of Agriculture, Forest Service, 1989
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Canada  Diseases and pests  Spruce bark beetles  Trees  United States  
  5. By: United States. Forest Service. Intermountain Region.
    Publication info: [Cedar City, UT], US Dept. of Agriculture, Forest Service, Intermountain Region, Dixie National Forest, [2000?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Diseases and pests  Dixie National Forest  Dixie National Forest (Utah)  Forest ecology  Forests and forestry  Spruce  Spruce bark beetles  Tree declines  Utah