Reference Label	Details
est unc	estimated uncertainty
Osborn 2012	D. L. Osborn, K. M. Vogelhuber, S. W. Wren, E. M. Miller, Y.-J. Lu, A. S. Case, L. Sheps, R. J. McMahon, J. F. Stanton, L. B. Harding, and W. Carl Lineberger, J. Am. Chem. Soc. xx, xxxx (2012) Electronic States of the Quasi-linear Molecule Propargylene (HCCCH) from Negative Ion Photoelectron Spectroscopy