The morphology of the lower ionospheric region in auroral latitudes

Agy, 1954, J. Geophys. Res., 59, 267, 10.1029/JZ059i002p00267 Agy, 1954, J. Geophys. Res., 59, 499, 10.1029/JZ059i004p00499 Agy, 1954, Nature, Lond., 173, 445, 10.1038/173445b0 Appleton, 1932, J. Inst. Elect. Engrs., 71, 642 Appleton, 1937, 162, 451 Appletone, 1937, Phil. Trans. A, 236, 191, 10.1098/rsta.1937.0002 Bates, 1956, Ann. Geophys. Chapman, 1957, J. Atmosph. Terr. Phys., 10, 20, 10.1016/0021-9169(57)90153-8 Farmer, 1935, 151, 370 Fukushima, 1949, Geophys. Notes, Tokyo Univ., 2 Matsushita, 1953, J. Geomagn. Geoelect. Kyoto, 5, 109, 10.5636/jgg.5.109 Matsushita, 1956, J. Geomagn. Geoelect. Kyoto, 8, 156, 10.5636/jgg.8.156 Meek, 1952, J. Geophys. Res., 57, 177, 10.1029/JZ057i002p00177 Meredith, 1955, Phys. Rev., 97, 201, 10.1103/PhysRev.97.201 Pauker, 1956, Phys. Rev., 103, 1518, 10.1103/PhysRev.103.1518 Piggott, 1953, Nature, Lond., 171, 124, 10.1038/171124a0 Smith, 1955, National Bureau of Standards Report No. 3575 Van Allen, 1955, Phys. Rev., 99, 609 Wells, 1947, Terr. Magn. Atmos. Elect., 52, 315, 10.1029/TE052i003p00315