Donald G. Janelle is former Program Director of the Center for Spatial Studies at the University of California, Santa Barbara, where he is now Research Emeritus; he is also Professor Emeritus at the University of Western Ontario.
4: 4. Reasoning with Diagrams: Toward a Broad Ontology of Spatial Thinking Strategies
2014. "4. Reasoning with Diagrams: Toward a Broad Ontology of Spatial Thinking Strategies", Space in Mind: Concepts for Spatial Learning and Education, Daniel R. Montello, Karl E. Grossner, Donald G. Janelle
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