@article{oai:nagoya.repo.nii.ac.jp:00020343,
 author = {Takagi, Masumi},
 journal = {Proceedings of the Research Institute of Atmospherics, Nagoya University},
 month = {Mar},
 pages = {39--41},
 title = {Section 2. Source of Atmospherics and Atmospheric Electricity},
 volume = {20},
 year = {1973}
}