TY - RPRT TI - NIST recommended practice guide WWVB radio controlled clocks AU - Deutsch, Matthew J AU - Nelson, Glenn K AU - Novick, Andrew N AU - Hanson, D Wayne AU - Lombardi, Michael A AU - Sutton, Douglas S AU - Yates, William C PY - 2009 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NBS SP 960-14 DO - 10.6028/NBS.SP.960-14 ER -