00625cam a2200181u 4500 621.31912 BAR L-9, P-12 Barr, James Robertson. [from old catalog] 41423 Principles of direct-current electrical engineering, 3rd ed. London, I. Pitman, 1943. x, 486 p. illus. 22 cm. 0 0 0 621_319120000000000_BAR Electric machinery Direct current. [from old catalog] 41335 Electrical engineering. MCE 379 Boulton, Douglas Joseph, [from old catalog] 41424 ddc BK 545531 545531 0 0 ddc 0 0 MCE MCE 2014-05-26 0 621.31912 BAR MCE-30429 2014-05-26 2014-05-26 BK