TY - JOUR AU - Sullivan, Donald AU - Bergquist, James AU - Drullinger, Robert AU - Itano, Wayne AU - Jefferts, Steven AU - Lee, D AU - Meekhof, D AU - Parker, Thomas AU - Walls, F AU - Wineland, David C2 - Journal of Research of the National Institute of Standards and Technology DA - 2001-01-01 LA - en M1 - 106 PB - Journal of Research of the National Institute of Standards and Technology PY - 2001 TI - Primary Atomic Frequency Standards at NIST ER -