Reference Label	Details
est unc	estimated uncertainty
Eriksson 1986	K.-B. S. Eriksson, Phys. Scr. 34, 211-215 (1986) Additions to the Spectrum of the Neutral Nitrogen Atom
de Beer 1992	E. de Beer, C. A. de Lange, and N. P. C. Westwood, Phys. Rev. A 46, 5653-5665 (1992) Resonance-Enhanced Multiphoton-Ionization Photoelectron Spectroscopy of np and nf Rydberg States of Atomic Nitrogen