TY - RPRT TI - Measurement assurance program- a case study : lengths measurements. Part 1. long gage blocks (5 in to 20 in) AU - Pontius, Paul E PY - 1975 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS MONO 149 DO - 10.6028/NBS.MONO.149 ER -