TY - JOUR AU - B Drake AU - William Martin C2 - Canadian Journal of Physics DA - 1998-07-01 00:07:00 LA - en M1 - 76 PB - Canadian Journal of Physics PY - 1998 TI - Ionization Energies and Quantum Electrodynamic Effects in the Lower 1 sns and 1 snp Levels of Neutral Helium (4HeI) ER -