JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 1994, Vol. 18 ›› Issue (03): 83-86.doi: 10.3969/j.jssn.1000-2006.1994.03.017
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Shi Jisen;Ye Zhihong(Nanjing Forestry University Nanjing 210037)Yu Rongzhuo;Li Shoumao;Weng Yuzhen