Telling the world /
Squier, George Owen,1865-1934.
Century of Progress International Exposition(1933-1934 :Chicago, Ill.)
Baltimore : Williams & Wilkins Co. in cooperation with the Century of progress exposition,
1933.
Includes bibliographical references (p. 156-162).
The story of electricity and magnetism.--The telegraph.--The telephone.--Radio.--Signal corps.
Telegraph
Telephone
Radio