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| | Record Unit 7230 - United States National Museum, Department of Geology, Biographical File |
 | | Includes letters to Ferdinand Vandeveer Hayden, February 17, 1862, April 7, 1866, and December 31, 1878; and Edward V. D'Invilliers to George P. Merrill, July 23, 1906. |
 | | Includes letters to Spencer F. Baird, November 28, 1884; Ferdinand Vandeveer Hayden, December 21, 1877; and, George P. Merrill, January 24, 1885. |
 | | Meek, Fielding B. Includes letters to Ferdinand Vandeveer Hayden, December 6, 1855, and February 15, 1876. |
| siarchives.si.edu /findingaids/FARU7230.htm (1056 words) |
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