1. Direction Finding Studies of Large-Scale Ionospheric Irregularities;Bramley,1953
2. The Fixing of Confidence Limits to Measurements;Josephs;J.I.E.E.,1945
3. A Phase Comparison Method of Measuring the Direction of Arrival of Ionospheric Radio Waves;Ross,1951
4. The Development of a High-Frequency Cathode-Ray Direction Finder for Naval Use;de Walden;J.I.E.E.,1947