Cite

Citation Info Harvard Map Collection, Harvard College Library. Lassailly, Charles.. Challamel, Pierre Joseph, b. 1813.. Dufour, F.. (2012-02). Tonkin Region, Vietnam, 1883 (Raster Image). [GeoTIFF]. Harvard Map Collection, Harvard College Library. Retrieved from https://geo.nyu.edu/catalog/harvard-g8020-1883-l3

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