TY - RPRT TI - Field service test model : computer-controlled U system. Operations manual and software operating system appendices for the automated system. Volume I. AU - Gray, K M AU - Ellis, J R PY - 1973 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 74-453 DO - 10.6028/NBS.IR.74-453 ER -