Lawrence, Ralph Principles of alternating-current machinery / Ralph R. Lawrence ; revisor Henry E. Richards. - 4a ed. - New York, NY. : MacGraw-Hill, 1953 - xx, 623 p. ; il. ; 23 cm. Incluye índice Subjects--Topical Terms: Máquinas eléctricas--Corrientes alterna LC Class. No.: TK2711 / L39 1953