00433nam a22001577a 4500 2228 2228 200218b ||||| |||| 00| 0 eng d 621.313 R6491 1808 Robertson, B. L. Electric circuits and machines Toronto D. Van Nostrand Company 1952 vii,434p. 23.12 Electric Machinery 1809 Black, L. J. BK 0 0 ddc 0 621_313000000000000_R6491 0 6027 CL CL 1953-03-18 A. H. Wheeler 621.313 R6491 01825 2020-02-18 BK 0 0 ddc 0 621_313000000000000_R6491 0 6028 CL CL 1953-03-18 A. H. Wheeler 621.313 R6491 01826 2020-02-18 BK