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\bibitem{Wu2010} Wu, S., Chang, A., Chang, M., Yen, Y.-R., \& Heh, J.-S. (2010). Learning Historical and Cultural Contents via Mobile Treasure Hunting in Five-harbor District of Taina. \textit{In the Proceedings of the 6th IEEE International Workshop on International Conference on Wireless, Mobile, and Ubiquitous Technologies in Education}, , 213--215.

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