00480nam a2200157Ia 4500003000900000008004100009040001600050080001800066100002800084245010400112250001200216260003200228300001600260650002700276650001900303IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a621.3.04bLAN  aLangsdorf, Alexander S. 0aPrinciples of direct-current machinescAlexander S. Langsdorf                                        a6th ed.  aNew YorkbMcGraw-Hillc1959  axvii, 363p.  aElectrical engineering  aNASA Thesaurus