GC1KZE0 TNT - Triangulation N' Trilateration (Unknown Cache) in Örebro, Sweden created by hoaxe
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Help Solving Triangulation - Geocaching topics - Geocaching Forums
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Dr. Alice Christie's Article on GPS and Geocaching in Education
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PDF) Ihamäki, P. (2015) User Experience of Geocaching and Its Application to Tourism and Education, Phd thesis, Annales Universitatis Turkuensis B404, University of Turku, Juvenes Ltd., Turku.
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