@article{weko_7604_1, author = "松田, 敏彦 and 丹治, 辰男", title = "直流機の整流火花について", journal = "室蘭工業大学研究報告. 理工編", year = "1969", volume = "6", number = "3", pages = "1015--1031", month = "jul" }