Electricity /
Kapp, Gisbert.
Electricity / by Gisbert Kapp. - London : Williams and Norgate, [192-?] ( - V, 256 p. : il. ; 17 cm.
Electricity / by Gisbert Kapp. - London : Williams and Norgate, [192-?] ( - V, 256 p. : il. ; 17 cm.
