Reference Label	Details
note unc	The quoted uncertainty appeared to correspond to one std dev. and was multiplied by 2 to come closer to the desired 95% confidence limit
Bergeson 1998	S. D. Bergeson, A. Balakrishnan, K. G. H. Baldwin, T. B. Lucatorto, J. P. Marangos, T. J. McIlrath, T. R. O'Brian, S. L. Rolston, C. J. Sansonetti, J. Wen, and N. Westbrook. Phys. Rev. Lett. 80, 3475-3478 (1998) Measurement of the He Ground State Lamb Shift via the Two-Photon 1 1S - 2 1S Transition