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  Author Title Year Publication Volume Pages Links
Andersen, O., Gundersen, V., Camilla, L., Stange, E., Counting visitors in alpine areas: how sensor range, clothing, air temperature and visitor volume affects passive infrared counter accuracy 2012 The 6th International Conference on Monitoring and Management of Visitors in Recreational and Protected Areas: Outdoor Recreation in Change – Current Knowledge and Future Challenges MMV 6 - Proceedings 32-33 details   pdf doi
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