About BEAMISH D
About British Geological Survey, Nottingham, GBR
About CLARK T D G
About British Geological Survey, Edinburgh, GBR
About CLARKE E
About British Geological Survey, Edinburgh, GBR
About THOMSON A W P
About British Geological Survey, Edinburgh, GBR
About Journal of Atmospheric and Solar-Terrestrial Physics
About earth current
About United Kingdom
About Power transmission and distribution in general
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About 地磁気変動
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