TY - GEN AU - Michael Lombardi C2 - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD DA - 2002-01-01 LA - en PB - Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD PY - 2002 TI - NIST Time and Frequency Services UR - https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105432 ER -