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Fig. 4

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versus for the BAL QSOs, the non-BAL QSOs and MM08 sample. The dashed line traces the locus of power-law spectra. Square symbols indicate sources lacking a 22-GHz flux density. For these, we adopted the mean value of the sample. Upper limits to  are plotted as triangles. Circles indicate objects in common with MM08 (symbol size increases with the RA of the source).

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