TY - RPRT TI - Report of the 91st National Conference on Weights and Measures AU - Butcher, Kenneth AU - Crown, Linda AU - Sebrign, Lynn PY - 2006 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 1053 DO - 10.6028/NIST.SP.1053 ER -