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Communicated by Prof. R. R. Daniel,f.a.sc.
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Apparao, M.V.K. Possible anisotropy of solar modulation and the low energy cosmic ray-spectra. Proc. Indian Acad. Sci. 67, 262–266 (1968). https://doi.org/10.1007/BF03049364
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DOI: https://doi.org/10.1007/BF03049364