The postal business 1969-79 : a study in public sector management / Michael E. Corby ;
BS EN 60868 : flickermeter: functional and design specifications: (IEC 868: 1986 + A1: 1990) / European Commitee for Electrothecnical Standardization
R&TTE Guide : Radio and telecommunications terminal equipment (R&TTE) / BSI - British Standard Institute
Interconnect costing / Peter Cartwright