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This research is supported in part by theOffice of Scientific Research. USAF.
On leave of absence from Tata Institute of Fundamental Research, Bombay, India.
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Rao, M.V.K.A., Kaplon, M.F. The influence of isotopic composition on the maximum in the cosmic ray energy spectra. Nuovo Cim 21, 369–372 (1961). https://doi.org/10.1007/BF02832562
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DOI: https://doi.org/10.1007/BF02832562