TY - JOUR AU - S Bergeson AU - K Baldwin AU - Thomas Lucatorto AU - T McIlrath AU - C Cheng AU - E Eyler C2 - Journal of the Optical Society of America B-Optical Physics DA - 2000-09-01 00:09:00 LA - en M1 - 17 PB - Journal of the Optical Society of America B-Optical Physics PY - 2000 TI - Doppler-Free Two-Photon Spectroscopy in the VUV: The Helium 11S - 21S Transition ER -