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Journal of Northwest Normal University(Natural Science)
1001-988X
1994 Issue 2
xiang zhuan yi tiao jian xia zuo xi cui hua ji cui hua zuo hua he cheng ben yi suan
wang jin xian
..............
page:119-120
ni jie he bz- dai shu ji qi tong tai ding li
zhang xiao hong
..............
page:31-35
