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      <marc:subfield code="a">Extreme values statistical assessment for geomagnetic and geoelectic field variations for Alberta / </marc:subfield>
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      <marc:subfield code="a">"Disturbances of the geomagnetic field produced by space weather events can have an impact on power systems and other critical infrastructure. This study aims to provide an understanding of possible geomagnetic effects on power systems in Alberta"--Summary, page 4.</marc:subfield>
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