000 00242nam a2200073 4500
080 _a
_b
245 _aIEC: 50(16)-1956; International Electrotechincal vocabulary group 16- Protective relays
700 _aInternational Electrotechnical Commission
260 _aGeneva
_bIEC
_c1956
300 _a56p
999 _c24327
_d24327