00398nam a22001457a 4500 2558 2558 200309b ||||| |||| 00| 0 eng d 621.31 P3591 2155 Pearce, W. E. School experiments with alternating currents London Bell 1951 xii,153 p. 6.00 Alternating Electric Currents BK 0 0 ddc 0 621_310000000000000_P3591 0 7246 CL CL 1953-03-26 A. H. Wheeler 621.31 P3591 02062 2020-03-09 BK