TY - CONF AU - Meekhof, D AU - Jefferts, Steven AU - Lee, D AU - Nelson, Craig C2 - CPEM ''98 , Washington, DC, USA DA - 1998-01-01 00:01:00 LA - en PB - CPEM ''98 , Washington, DC, USA PY - 1998 TI - Preliminary Results from the NIST Cs Fountain Frequency Standard ER -