Historical patterns of spruce budworm defoliation and bark beetle outbreaks in North American conifer forests: an atlas and description of digital maps
| Main Author: | Williams, David W. 1957- |
|---|---|
| Other Authors: | Birdsey, Richard A. |
| Published: |
Newton Square, PA :
United States Department of Agriculture, Forest Service ,
2003.
|
| Series: |
United States Department of Agriculture, General Technical Report, NE-308.
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| Subjects: | |
| Online Access: |
http://www.treesearch.fs.fed.us/pubs/5521 |