Multiplex telephony and telegraphy, by means of electric waves guided by wires.
Squier, George Owen, 1865-
Multiplex telephony and telegraphy, by means of electric waves guided by wires. By George O. Squier. - Washington, Govt. Print. Off., 1911. - 102 p. illus., diagrs. 23 cm. - Professional paper of the Signal Corps, U.S. Army. .
On verso of t.-p.: War Department. Document no. 390.
war11000100
Telephone.
Telegraph.
TK6421 / .S8
Multiplex telephony and telegraphy, by means of electric waves guided by wires. By George O. Squier. - Washington, Govt. Print. Off., 1911. - 102 p. illus., diagrs. 23 cm. - Professional paper of the Signal Corps, U.S. Army. .
On verso of t.-p.: War Department. Document no. 390.
war11000100
Telephone.
Telegraph.
TK6421 / .S8