| [Fredericksburg Magnetic Observatory] [U.S. Coast and Geodetic Survey - :10061 | NOAA General Documents
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[Fredericksburg Magnetic Observatory] [U.S. Coast and Geodetic Survey
  • Published Date:
    1956
Filetype[MP4-23.53 MB]


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[Fredericksburg Magnetic Observatory] [U.S. Coast and Geodetic Survey
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