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2. Transit times—a factor in solar-terrestrial disturbances;Anderson;The Sky,1941
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4. Le réseau magnétique de Madagascar au 1er janvier 1938;Besairie;Bull. Soc. Hist. Nat.,1941
5. Contributions of ionospheric research to geomagnetism;Berkner;Proc. Amer. Phil. Soc.,1941