Reference Label	Details
Huber 1979	K. P. Huber and G. Herzberg, "Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules", Van Nostrand Reinhold: New York 1979
est unc	estimated uncertainty
Birtwistle 1971	D. T. Birtwistle and A. Herzenberg, J. Phys. B 4, 53-70 (1971) Vibrational Excitation of N2 by Resonance Scattering of Electrons