@article{oai:nagoya.repo.nii.ac.jp:00020072,
 author = {Matuura, Nobuo and Okada, Toshimi},
 journal = {Proceedings of the Research Institute of Atmospherics, Nagoya University},
 month = {Mar},
 pages = {113--116},
 title = {ACTIVITY REPORT : Group 2.1 Ionospheric Physics},
 volume = {36},
 year = {1989}
}