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Western spruce budworm

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1.
Historical patterns of spruce budworm defoliation and bark beetle outbreaks in North American conifer forests : an atlas and description of digital maps
Author
Williams, David W.
Published
Newtown Square, PA : U.S. Dept. of Agriculture, Forest Service, Northeastern Research Station, [2003]
Online
Online book
Location
HathiTrust Digital Library >> Online Resource
Format
Maps & GIS / Online