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Fig. 13

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Orbital period distribution of the 48 non-SDSS PCEBs that contain a white dwarf plus a main sequence star (grey histogram) and the 65 systems SDSS PCEBs discovered through radial velocity variations on spectra taken on different nights (dashed histogram) in days. Bottom panel: cumulative distribution function of non SDSS PCEBs (grey line) and SDSS PCEBs (black dashed line).

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