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On Polar Magnetic Field Reversal in Solar Cycles 21, 22, 23, and 24. (arXiv:1909.00055v1 [astro-ph.SR]) http://arxiv.org/abs/1909.00055
On Polar Magnetic Field Reversal in Solar Cycles 21, 22, 23, and 24. (arXiv:1909.00055v1 [astro-ph.SR]) http://arxiv.org/abs/1909.00055