Rest-frame spectral energy distributions of the quasars in our sample. Mean spectra for each source are shown together with our R-band (stars) and JHK 2MASS (circles) photometry. Two extrapolations to 5100 Å are also included: from 1350 Å (triangles) using the correlation determined in Mejía-Restrepo et al. (2016), and from the R-band photometry (squares) using the UV power-law index determined by Vanden Berk et al. (2001).