| 21. | The peak was named for A . D . Wilson, a topographer with the Hayden Survey.
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| 22. | Well regarded sources also describe him as a topographer, but without identifying his contribution to topography.
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| 23. | As well as a physicist and a mathematician, Maldonado was an astronomer, topographer, and geographer.
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| 24. | The grave of a prominent Russian topographer Andrei Pastukhov is located on the southern slope of the mountain.
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| 25. | They were told by the topographer's union that the business cards appear to date from the 1890s.
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| 26. | Egloffstein was hired as a topographer for the last Western expedition of John Charles Fr�mont, 1853-54.
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| 27. | Richard Kern, a topographer and expeditionary artist, traveled with Beckwith to illustrate the land for the report.
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| 28. | Mount Pendleton was named in 1961 by the U . S . Geological Survey for topographer Thomas Percy Pendleton.
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| 29. | Urz�a also drew on his training as a topographer to map the tunnels that became their sticky, damp home.
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| 30. | Bath Mountain was so named when a USGS topographer took a bath in a lake at its base in 1905.
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