... models

Figures 4-9, 11-14, 16, 17, 19-21, 23, 24 are only avalaible in electronic form at http://www.edpsciences.org

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... Figs. 2-25

Figures 2, 3, 10, 15, 18, 22, and 25 are displayed in the printed version of this paper as representative examples of the M supergiants, and the M, S, and C-type giants; all spectra are available in the electronic version.

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