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GeoJournal > 2013 > 78 > 5 > 803-815
Journal of Geographical Systems > 2010 > 12 > 1 > 69-87
Journal of Geographical Systems > 2002 > 4 > 4 > 405-421
GeoJournal > 2013 > 78 > 5 > 803-815
Journal of Geographical Systems > 2010 > 12 > 1 > 69-87
Journal of Geographical Systems > 2002 > 4 > 4 > 405-421