000
00296nam a2200121Ia 4500
008
190711s9999 xx 000 0 und d
082
_a
621.3178 C521
100
_a
CHERNOBROVOV,N
245
0
_a
PROTECTIVE RELAYING
260
_a
MOSCOW
_b
MIR Publishers
_c
1974
300
_a
21X14
942
_c
BK
_2
DDC
999
_c
16779
_d
16779