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NOAA Photo Library Image - cgs02139

Geomagnetic observatories that were currently putting hourly values in machine- readable form as of 1969.

Image ID: cgs02139, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1969


Category: Coast and Geodetic Survey/Geophysics Geomagnetism/

• High Resolution Photo Available




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Last Updated: September 30, 2009