00355cam a2200133ua 4500 OSt 210915b ||||| |||| 00| 0 eng d 621.317 RYD/EA Ryder, R W . 5034 Earthing principles and practices / London : Sir Isaac Pitman & Sons Ltd , 1952. 108 ; . BK 337542 337542 1 0 1 0 KAUAET KAUAET 2012-04-07 0 621.317 KAU_KCAEFT-3747 2025-09-03 00:00:00 2025-09-03 BK