joint author
joint authorship
https://source.unsplash.com/featured/?joint-author#.png
/suto3/google.iconjoint author
/suto3/Google画像検索.iconjoint author
/suto3/Google定義検索.icon joint author
/suto3/wikipedia.iconjoint author
/suto3/weblio.icon joint author
/suto3/kotobank.icon joint author
/suto3/jisho.icon joint author