Acquisition of Qualitative Spatial Representation by Visual Observation
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\begin{bibtex} @inproceedings{DBLP:conf/ijcai/SogoII99, title={Acquisition of Qualitative Spatial Representation by Visual Observation}, pages={1054-1060}, year={1999}, crossref={DBLP:conf/ijcai/99}, booktitle={IJCAI}, url={http://www.informatik.uni-trier.de/~ley/db/conf/ijcai/ijcai99.html#SogoII99}, author={Takushi Sogo and Hiroshi Ishiguro and Toru Ishida} }\end{bibtex}
