TY - BOOK AU - Weiske,Wolfgang TI - Three-phase electricity SN - 3800940388 (hbk.) PY - 1979/// PY - 1979/// CY - Berlin, London PB - Siemens Aktiengesellschaft, Heyden KW - Electric currents, Alternating N1 - Title of German original edition: Der Drehstrom ER -