3 ms·
https://www.jstage.jst.go.jp/article/jibirin1925/82/1/82_1_133/_article https://www.jstage.jst.go.jp/article/jibirin1925/82/1/82_1_1...
by The_rationalist 5y ago
https://www.jstage.jst.go.jp/article/jibirin1925/82/1/82_1_133/_article https://www.jstage.jst.go.jp/article/jibirin1925/82/1/82_1_1...