@article{oai:nagoya.repo.nii.ac.jp:00019462, author = {岩井, 章 and 田中, 津太雄 and 加藤, 利郎 and IWAI, Akira and TANAKA, Tsutao and KATO, Toshio}, issue = {1-2}, journal = {空電研究所報告}, month = {Mar}, note = {Since our first design of portable direction finder of atmospherics type D-30,techniques of measurement have been 50 developed that we devised an another improved one which will meet recent requirements. Design details and characteristics are fully described.}, pages = {48--54}, title = {D-26型空電方位測定機}, volume = {3}, year = {1953} }