TY - GEN AU - Graham, Robert M AU - Gust, Jeff C C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2009-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.960-12e2 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2009 TI - NIST recommended practice guide ::stopwatch and timer calibrations (2009 edition)/ ER -