@article{oai:nagoya.repo.nii.ac.jp:00020057, author = {HAYAKAWA, Masashi and OHTSU, Jinsuke and IWAI, Akira}, journal = {Proceedings of the Research Institute of Atmospherics, Nagoya University}, month = {Mar}, pages = {183--190}, title = {PENETRATION OF WHISTLERS THROUGH THE IONOSPHERE}, volume = {16}, year = {1969} }