Reference Label	Details
Turner 1970	D. W. Turner, C. Baker, A. D. Baker, and C. R. Brundle, "Molecular Photoelectron Spectroscopy", Wiley: New York 1970
est unc	estimated uncertainty
Bieri 1980a	G. Bieri and L. Åsbrink, J. Electron Spectrosc. Relat. Phenom. 20, 149-167 (1980) 30.4-nm He(II) Photoelectron Spectra of Organic Molecules. Part I. Hydrocarbons