National electrical code handbook / National Fire Protection Association ; Mark W. Early editor-in-chief ...[et al.] - Sixth Edition - Quincy, Massachusetts : NFPA, c1992. - xvi, 1120 p. : il. ; 28 cm ISBN: 0877653844 B/.20.00 Subjects--Topical Terms: NORMAS ELECTRICASINGENIERIA ELECTRICA --NORMAS TECNICAS Dewey Class. No.: R 621.319240218 / N213