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1Subjects: “...Spruce Alaska....”
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2Published 1984Subjects: “...Sitka spruce....”
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3Published 1978Subjects: “...White spruce....”
Government Document Book -
4by Werner, Richard A. (Richard Allen), 1936-Subjects: “...Spruce bark beetles....”
Published 1978
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5Published 1981Subjects: “...Western spruce budworm....”
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10by Campbell, Robert W.Subjects: “...Western spruce budworm....”
Published 1984
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12Published 1980Subjects: “...Spruce budworm Montana....”
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13by Martignoni, Mauro E., 1926-Subjects: “...Western spruce budworm....”
Published 1981
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15
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16Published 1979Subjects: “...Black spruce....”
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20