TY - RPRT TI - Field service test model : computer-controlled U system manual for system AU - Carpenter, R J AU - Gray, K M AU - Grubb, D S AU - Palombo, L J PY - 1973 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 73-271 DO - 10.6028/NBS.IR.73-271 ER -