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- [14] WINDS IN THE UPPER ATMOSPHERE BY METEOR-TRAIN PHOTOGRAPHY JOURNAL OF METEOROLOGY, 1953, 10 (05): : 390 - 392
- [16] Further note on the ionization in the upper atmosphere PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1929, 17 : 1313 - 1315
- [17] Wireless telegraphy and the ionization in the upper atmosphere PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1930, 18 (07): : 1231 - 1238
- [18] Note on the determination of the ionization in the upper atmosphere PROCEEDINGS OF THE INSTITUTE OF RADIO ENGINEERS, 1928, 16 (11): : 1471 - 1476
- [19] The ionization of the earth's upper atmosphere TRANSACTIONS-AMERICAN GEOPHYSICAL UNION, 1935, 16 : 20 - 26
- [20] Ionization in the upper atmosphere variation with longitude PHYSICAL REVIEW, 1930, 35 (03): : 0240 - 0247