1. 1
    by Hertz, Heinrich, 1857-1894
    Published 1893
    Subjects ...Electric waves....
    Book
  2. 2
    by Hertz, Heinrich, 1857-1894
    Published 1900
    Subjects ...Electric waves....
    Book
  3. 3
    by Lodge, Oliver, Sir, 1851-1940
    Published 1900
    Subjects ...Electric waves....
    Book