TY  - JOUR
AU  - Thomas Heavner
AU  - Steven Jefferts
AU  - Elizabeth Donley
AU  - Jon Shirley
AU  - Tom Parker
C2  - Metrologia
DA  - 2005-09-13 00:09:00
LA  - en
M1  - 42
PB  - Metrologia
PY  - 2005
TI  - NIST F1: Recent improvements and a resulting accuracy of &#948;f/f=0.53x10<sup>-15</sup>
UR  - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50098
ER  -