@article{oai:nagoya.repo.nii.ac.jp:00019912,
 author = {SAO, Kazuo},
 journal = {Proceedings of the Research Institute of Atmospherics, Nagoya University},
 month = {Mar},
 pages = {61--66},
 title = {Section 1. Propagation of Atmospherics and ELF Radio Noise},
 volume = {14},
 year = {1967}
}