南京林业大学学报（自然科学版）
Analysis of material flow and energy flow in forest logging system
ZHAO Chen1, WANG Da-ming1, ZHANG Zheng-xiong2
Journal of Nanjing Forestry University (Natural Sciences Edition） . 2008, (05): 37 -40 .  DOI: 10.3969/j.jssn.1000-2006.2008.05.007

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