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2Published 1969“...Northeastern Forest Experiment Station, Forest Service, U.S. ...”
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3Published 1970“...Northeastern Forest Experiment Station, Forest Service, U.S. ...”
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4Published 1981“...Northeastern Forest Experiment Station, Forest Service, U.S. ...”
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5Published 1981“...Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station,...”
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6Published 1977“...Northeastern Forest Experiment Station, Forest Service, U.S. ...”
Government Document Serial