por Kaplan, Wilfred, 1915- [autor] | Dignowity, Lionel [traductor].
por Mileaf, Harry [editor] | Dignowity, Lionel [traductor].
por Mileaf, Harry [autor] | Dignowity, Lionel [traductor] | Perez Vega, Candido [rev.] | Barrios-Morales Frias, Daniel [colaborador].
por Ibbetson, Willie Waite Skirrow, 1879- [autor] | Urwin, C. R [editor] | Parker, W. F [editor] | Thomson, F. G [editor] | Dignowity, Lionel [traductor] | Ibbetson, Willie Waite Skirrow, 1879-. Ibbetson's electric wring.