@article{oai:nagoya.repo.nii.ac.jp:00019592,
 author = {佐尾, 和夫 and 前田, 都哉子 and SAO, Kazuo and MAEDA, Tsuyako},
 issue = {1},
 journal = {空電研究所報告},
 month = {Sep},
 note = {As is well known, the distance of atmospheric source and the virtual height of ionospheric layer can be computed from observation of atmospheric wave forms at night. The nomographs determining the height of layer, and the graphs obtaining the distance travelled are drawn to simplify the calculation.},
 pages = {42--55},
 title = {夜間の電離層反射型空電波形より電離層の見掛けの高さを求める計算図表と空電源の距離を求めるグラフ},
 volume = {4},
 year = {1953}
}