1 “... in the Earth's Magnetic Field' which was held at the Bergen Tekniske Skole, Bergen, Norway, during the period...”

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3 “... life of early 20th century in Norway and to the development of the space sciences in the post-Sputnik...”

4 “... Advanced Workshop on the "Morphology and Dynamics of the Polar Cusp", held at Lillehammer, Norway, 7-12 May...”