TY - RPRT TI - Precise theory of levels of hydrogen and deuterium : the two-photon radiative corrections AU - Jentschura, Ulrich D AU - Mohr, Peter J PY - 2005 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 7217 DO - 10.6028/NIST.IR.7217 ER -