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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:51, 1 March 2011 | 900 × 857 (441 KB) | Droll | {{Information |Description ={{en|1=Graphic representation NAVD 88 minus NGVD 28 daum shift contours }} |Source =http://www.ngs.noaa.gov/TOOLS/Vertcon/Vertcon_Map.html |Author =National Geodetic Survey (NGS) |Date = |Permission |
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