ACTA AGRICULTURAE BOREALI-SINICA ›› 1989, Vol. 4 ›› Issue (4): 140-141. doi: 10.3321/j.issn:1000-7091.1989.04.027
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URL: http://www.hbnxb.net/EN/10.3321/j.issn:1000-7091.1989.04.027
http://www.hbnxb.net/EN/Y1989/V4/I4/140