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1CATACLYSMIC POLARITY SHIFT IS U.S. NATIONAL SECURITY PREPARED FOR THE NEXT GEOMAGNETIC POLE REVERSALby Williams,Tyler JContributors: “...AIR COMMAND AND STAFF COLLEGE MAXWELL AFB United States...”
Published 2015
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2by Deja, CathyrineContributors: “...Air Command And Staff College Maxwell AFB United States...”
Published 2016
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