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Fig. 1


Medium resolution SDSS spectra (R ~ 1800, top spectra) of two extremely metal-poor candidates, J0105+4615 (left panel) and J1642+4430 (right panel), together with ISIS spectra (R ~ 2400, bottom spectra) obtained at the 4.2 m-WHT. The Ca ii K spectral lines from the star and the ISM are indicated.

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