00402nam a22001577a 4500 900 900 191230b ||||| |||| 00| 0 eng d 621.313 H6698 247 Hirst, A. W. Introduction to electrical machines 2nd London Blackie and Sons 1947 iv,144p. 5.09 Electric Machinery BK 0 0 ddc 0 621_313000000000000_H6698 0 3136 CL CL 1952-10-20 Blackie 621.313 H6698 00481 2019-12-30 BK 0 0 ddc 0 621_313000000000000_H6698 0 3137 CL CL 1952-10-20 Blackie 621.313 H6698 00482 2019-12-30 BK