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Journal of Zhengzhou Institute of Surveying and Mapping
1673-6338
1995 Issue 4
fei xian xing wei shuang qu fang cheng de di er chu bian zhi wen ti
Ren Liucheng
..............
page:309-312
zhi kui gm mo xing can shu gu ji de ruo gan wen ti
Li Guangyun
..............
page:235-242
