Thinning operations in forestry

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不详
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来源：
NATURE | 1930年 / 126卷
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暂无
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
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页码：743 / 743
页数：1
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