American Astronomical Society, Astrophysical Journal, 1(806), p. 83, 2015
DOI: 10.1088/0004-637x/806/1/83
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We use the integrated polarized radio emission at 1.4 GHz ($Π_{\rm 1.4\,GHz}$) from a large sample of AGN (796 sources at redshifts $z