games_royal_society_of_london_proceedings_of_the_royal_society_of_london_1854-1905_1860_1868.01.01_-_proc.rsl_-_rokeby_l._-_results_of_magnetical_observations_made_at_ascension_island_latitude_7a_5520_south_longitude_14a_2530_west_from_july_1863_to_march_1866_-_doi_10.1098.rspl.1868.0076.pdf
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