@article{oai:nagoya.repo.nii.ac.jp:00019701,
 author = {石川, 晴治 and 高木, 増美 and 竹内, 利雄 and ISIKAWA, Haruzi and TAKAGI, Masumi and TAKEUTI, Tosio},
 issue = {1-2},
 journal = {空電研究所報告},
 month = {Mar},
 note = {Authors have investigated the initial portion of lightning discharges on the waveforms of atmospherics recorded with trigger method, and obtained following results: (1) More than 80 % of lightning discharges occurring within the range 150 km. are cloud discharges. (2) The initial portion of the stepped leader of a ground discharge must be cloud discharges producing very similar waveforms to the true α type stepped leader. (3) Some of the stepped leaders have no initial pulses, and the leader begins with a group of isolated pulses or with high frequency pulsations, which seems to mean that the leader begins without any leading cloud discharges described in paragraph(2). The situation is also the same for the case of cloud discharges.},
 pages = {1--10},
 title = {雷放電の研究（第1報） : 雷放電の放電開始について},
 volume = {8},
 year = {1958}
}