TY - RPRT TI - The FCC public message services policy change : an ETIP evaluability assessment report AU - Bell, James AU - Kirby, Sharon AU - Weiss, Roland G AU - Watson, Steve PY - 1979 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 1104 DO - 10.6028/NBS.TN.1104 ER -