Cite

Citation Info Harvard Map Collection, Harvard College Library. O'Shaughnessy, M. M. (Michael Maurice), 1864-1934.. (2008-01). Twin Peaks Tunnel assessment map, San Francisco, California 1927 (Raster Image). [GeoTIFF]. Harvard Map Collection, Harvard College Library. Retrieved from https://geo.nyu.edu/catalog/harvard-g4364-s5p24-1927-o8

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