Adcock radio range station, Antenna Conversion Kit for Radio Transmitters BC-446-A, -B, -C, -D, -E, -F, -H, Voice Conversion Kit for Radio Transmitters BC-446-A, -B, … Echo box TS-280/TPS-3 - USA Voorschrift, Technical Manual, 11-1083 Military Engineering. Volume III. Part II. Pamphlet no. 5 a. Small Box Girder Bridge, Mark III, 1939 - Engeland Voorschrift
