@article{oai:nagoya.repo.nii.ac.jp:00019644,
 author = {仲井, 猛敏 and NAKAI, Taketoshi},
 issue = {2},
 journal = {空電研究所報告},
 month = {Mar},
 note = {A method of frequency analysis is introduced on the principle of the Fourier analysis. The several waveforms of the "quasisinusoidal" type in the daytime are analysed by this method. Each one cycle of the sequence of these waveforms is analysed into components, and the general characteristics of each frequency spectrum are investigated, referring to that of the complete waveform. In the latter part, the behaviour of the frequency spectrum is discussed with respect to the distance from the origin of atmospherics.},
 pages = {94--104},
 title = {主放電型昼間時空電波形の周波数スペクトル (I)},
 volume = {5},
 year = {1955}
}