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- [4] BOWEN, 1938, PHYS REV, V53, P855
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- [6] HILBERRY N, 1941, PHYS REV, V60, P7
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- [9] THE INCREASE IN THE PRIMARY COSMIC-RAY INTENSITY AT HIGH LATITUDES, AND THE NON-EXISTENCE OF A DETECTABLE PERMANENT SOLAR MAGNETIC FIELD [J]. PHYSICAL REVIEW, 1950, 77 (06): : 830 - 837