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Detailed Reference Information
Keeling 1907
Keeling, B.F.E. (1907). Helwan Magnetic Observatory, Egypt. Terrestrial Magnetism and Atmospheric Electricity 12: doi: 10.1029/TE012i004p00149. issn: 0096-8013.
Journal
Terrestrial Magnetism and Atmospheric Electricity
Publisher
American Geophysical Union
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