TY  - BOOK
AU  - International Electrotechnical Commission
TI  - IEC: 947-6-1 - 1989 (Amendt No.1 - 1994); Low-voltage switchgear and controlgear Part 6 - Multiple function equipment section 1: Automatic transfer switching equipment
PY  - 1994///
CY  - Geneva
PB  - IEC
ER  -