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Operating magnetic instruments The Coast and Geodetic Survey was the Nation's primary geophysical agency until the early 1970's when its geomagnetic d Picture

Operating magnetic instruments The Coast and Geodetic Survey was the Nation's primary geophysical agency until the early 1970's when its geomagnetic d

Operating magnetic instruments The Coast and Geodetic Survey was the Nation’s primary geophysical agency until the early 1970’s when its geomagnetic duties were transferred to the USGS.

Photo Category: Coast and Geodetic Survey - Geophysics Geomagnetism
Photo Date: 1957 ca.

Author: NOAA

License: Public Domain Mark 1.0 (Public domain)
640 x 424 41.28 KB
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Added On
16th October 2015
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