Willits, S., R. Woodfin, and T. Snellgrove. 1990. Lumber recovery from dead ponderosa pine in the Colorado Front Range. United States Department of Agriculture, Forest Service, Pacific Northwest Research Station (Portland, OR), Research Paper PNW-RP-428.
Willits et al. 1990
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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