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 ... features will be considered. The spectra from the 1961 shower were classified into four groups on the basis of the presence of certain spectral lines as follows: Group 1 — The H and K lines of ionized calcium Group 2 — The magnesium triplet at...  Evolutionary and Physical Properties of Meteoroids: The Proceedings of the ... - الصفحة 141 المحررون: - 1973 - عدد الصفحات: 378 عرض كامل -
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