000			00351nam a2200157Ia 4500
100			_aVan, A R and Warrington, C
245			_aprotective relays their theory and practice vol.1 _b
260			_aLondon _bChapman and Hall 1971
300			_a
490			_a
500			_a
690			_a
700			_a
964			_a _b _c _d _e _f _g
999			_c424769 _d424769