Comments on ?solar activity, 27-day variation and long-term modulation of cosmic-ray intensity? by V. K. Balasubrahmanyan and D. Venkatesan
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2006 ◽
Vol 37
(8)
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pp. 1621-1628
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2011 ◽
Vol 73
(2-3)
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pp. 294-299
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2012 ◽
Vol 39
(6)
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pp. 175-180
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