Mot so ket qua nghien cuu ve dac diem cua tu truong Trai Dat o quan dao Truong Sa (Some study results of the Earth's magnetic field characteristics on the Truong Sa archipelago)
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Mot so ket qua nghien cuu ve dac diem cua tu truong Trai Dat o quan dao Truong Sa (Some study results of the Earth's magnetic field characteristics on the Truong Sa archipelago)