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Cooperative State Research Service, U.S. Dept. of Agriculture,
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出版社:
Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service,
出版日期: [1979]
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出版社:
Agricultural Research Service, U.S. Dept. of Agriculture in cooperation with Arkansas, California, and Texas Agricultural Experiment Stations,
出版日期: 1977.
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