JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 1997, Vol. 21 ›› Issue (02): 70-73.doi: 10.3969/j.jssn.1000-2006.1997.02.016
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URL: http://nldxb.njfu.edu.cn/EN/10.3969/j.jssn.1000-2006.1997.02.016
http://nldxb.njfu.edu.cn/EN/Y1997/V21/I02/70