Supplemental materials for Shen et al. (2019, ApJ, 873, 35).

./ascii_spec/: GNIRS spectra for the 50 high-z quasars
./coadd_spec/: coadded spectrum for the GNIRS high-z quasar sample
./tab3_full.fits: the full FITS Table 3 in the paper
./dr7_control.fits: the low-z control quasar sample drawn from SDSS-DR7