Electrical Instruments and Telephones of the U.S. Signal Corps

Regulations Governing Commercial Radio Service Between Ship and Shore Stations

History of the Signal Service, With Catalogue of Publications, Instruments and Stations

Visual Signaling, Signal Corps, United States Army, 1910

Annual Report

Annual Report Of The Chief Signal Officer Made To The Secretary Of War For The Year ..., Part 1

Monthly Weather Review, Volume 45

Monthly Weather Review, Volume 36

Bulletin Of International Meteorology

Annual Report Of The Chief Signal Officer

Monthly Weather Review