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I won't argue about them looking pretty.
One of the aspects (probably the only) of Kaler's "Stars and their Spectra" I dislike is that most of his spectra are 1D plots, and b&w to make them even less appealing and informative.
Re your earlier question on the amplitude ratios: yes, only the ratio of the maximum amplitudes of the Balmer lines. Unless there are very close spectral lines from other elements involved (very likely) I would expect the FWHM values to be about the same for each of the hydrogen lines.
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