TY - JOUR AU - Hall, John AU - Ye, Jun AU - Ma, L AU - Vogel, K AU - Dinneen, Tim C2 - International Conference on Laser Spectroscopy DA - 2008-10-16 14:10:14 LA - en PB - International Conference on Laser Spectroscopy PY - 2008 TI - Optical frequency standards: Progress and applications ER -