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- [22] PROPAGATION OF RADIO WAVES IN THE LOWER TROPOSPHERE PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1947, 35 (11): : 1198 - 1202
- [23] STUDIES IN IONOSPHERIC PROPAGATION OF RADIO WAVES RADIO ENGINEERING AND ELECTRONIC PHYSICS-USSR, 1967, 12 (11): : 1772 - &
- [26] THE PROPAGATION OF RADIO WAVES THROUGH THE GROUND PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1948, 36 (03): : 377 - 377