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ABNORMAL IONIZATION IN THE LOWER IONOSPHERE ASSOCIATED WITH COSMIC-RAY FLUX ENHANCEMENTS
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VERY-LOW-FREQUENCY EFFECTS FROM NOVEMBER 10, 1961, POLAR-CAP ABSORPTION EVENT
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JOURNAL OF GEOPHYSICAL RESEARCH,
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CHIVERS HJA, TO BE PUBLISHED
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ON USE OF VLF MEASUREMENTS FOR OBTAINING INFORMATION ON LOWER INOSPHERE (ESPECIALLY DURING SOLAR FLARES)
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PROCEEDINGS OF THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS,
1965, 53 (12)
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LONG-TERM VARIATION OF IONOSPHERIC REFLECTION HEIGHTS FOR VLF RADIO WAVES
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JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS,
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ERIKSEN KW, 1962, ARK GEOFYS, V3, P489
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THE RIOMETER - A DEVICE FOR THE CONTINUOUS MEASUREMENT OF IONOSPHERIC ABSORPTION
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VLF PHASE SHIFTS ASSOCIATED WITH THE DISTURBANCE OF FEBRUARY 23, 1956
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REID GC, 1967, SPACE RES, V8, P864