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Fig. 4

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Observed spectra in black and synthetic spectra in red for the B3-BW-B6 stars. The three Zr-lines, the [O i]-line, the OH-lines, and the HF-line used are marked. The exact wavelengths are listed in Table 4. The OH-lines with obvious cosmic hits were excluded from the fit. Note the different flux scales. An example of the HF-line in the re-analyzed BMB-I-IV can be found in Cunha et al. (2008).

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