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Science of Surveying and Mapping
1009-2307
1990 Issue 1
pc-1500 ji jie sheng zi jie de fang fa
cao lai fa ;
..............page:44-45
qian tan di xing tu de gai jin wen ti
wu hong gan ;
..............page:42-44
cai se di tu de jian se yu si se yin shua ji shu
ye tai qi ;
..............page:14-18