TY  - RPRT
TI  - The parametric cost-revenue model (PAREC) for electronic message service systems 
AU  - Witzgall, Christoph
PY  - 1986
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 1225
DO  - 10.6028/NBS.TN.1225
ER  -