gukje jigu gwancheungnyeon
International Geophysical Year
Année internationale de la géophysique
국제 지구 관측년은 1957년에 시작되었습니다.
gukje jigu gwancheoknyeon-eun 1957-nyeon-eun sijakdoeeossseubnida.
The International Geophysical Year started in 1957.
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