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\bibitem{Martinez-Santos+Martinez-Alfaro2014} Mart{\'\i}nez-Santos, P., \& Mart{\'\i}nez-Alfaro, P. E. (2014). A priori mapping of historical water-supply galleries based on archive records and sparse material remains. An application to the Amaniel qanat (Madrid, Spain). \textit{Journal of Cultural Heritage}, \textit{15}(6), 656--664.

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