Emission spectra of Nd recorded using Fourier transform spectroscopy between 19 659 and 19 669 cm⁻¹ (vacuum) containing lines with intermediate S/Ns and showing weak and uncertain blended spectral lines. Penning discharge lamp (PDL) and hollow cathode lamp (HCL) spectra are the solid and dash-dotted lines, respectively. The dotted line shows fits to the 13 lines identified in the PDL spectrum, residuals are shown at the bottom. Lines identified and fitted in the PDL spectrum are indicated by vertical arrows and labels, those with label U are unclassified.