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  1. By: Ostry, Michael E. - Anderson, Neil A. - O'Brien, Joseph G. - United States. Forest Service. Northern Research Station.
    Publication info: Newtown Square, PA, U.S. Dept. of Agriculture, Forest Service, Northern Research Station, [2011]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  2. By: Bedker, Peter John. - Mielke, Manfred E. - O'Brien, Joseph G. - United States. State and Private Forestry. Northeastern Area.
    Publication info: [Radnor, PA?], U.S. Dept. of Agriculture, Forest Service, Northeastern Area, State & Private Forestry, [1995?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
  3. By: Bedker, Peter John. - Mielke, Manfred E. - O'Brien, Joseph G. - United States. State and Private Forestry. Northeastern Area.
    Publication info: [Radnor, PA?], U.S. Dept. of Agriculture, Forest Service, Northeastern Area, State & Private Forestry, [1995?]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library