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Astronomical Society of the Pacific. Bibcode:2002ASPC..269...85G. ISBN 978-1-58381-109-2. Staff (4 March 2010). "Oldest measurement of Earth's magnetic field...219 KB (19,285 words) - 00:07, 11 May 2024
Astronomical Society of the Pacific. Bibcode:2002ASPC..269...85G. ISBN 978-1-58381-109-2. Voosen, Paul (March 9, 2021). "Ancient Earth was a water world"....128 KB (17,537 words) - 20:53, 7 May 2024
