TY - JOUR AU - Berkeland, D AU - Miller, J AU - Bergquist, James AU - Itano, Wayne AU - Wineland, David C2 - Physical Review Letters DA - 1998-03-09 00:03:00 LA - en M1 - 80 PB - Physical Review Letters PY - 1998 TI - Laser-Cooled Mercury Ion Frequency Standard ER -