000 00300pam a2200121a 44500
082 _a621.3132
_bL26p6
100 _aLangsdorf, Alexander S.
245 1 _aPRINCIPLES OF DIRECT-CURRENT MACHINES
260 _aNew York
_bMcgraw-Hill
_c1959
300 _axvii,363
964 _gCIRC
997 _a22172 C
999 _c435890
_d435890