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| 2008 | ||
|---|---|---|
| 1 | Liu Xin, Liu Wen-bao, Li Cheng-ming: Qualitative Representation and Reasoning of Combined Direction and Distance Relationships in Three-Dimensional GIS. CSSE (1) 2008: 119-123 | |
| 1 | Liu Wen-bao | [1] |
| 2 | Liu Xin | [1] |
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