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Journal of Natural Science of Heilongjiang University
1001-7011
1998 Issue 1
shui yang suan xi tu yan dui ti gao ju lv yi xi re wen ding xing de yan jiu
li zuo
..............
page:96-99
jie yi wei he er wei dui liu kuo san fang cheng de dan diao cha fen ge shi
jin cheng ri
..............
page:12-15
