ページの作成:「That’s 3-quarters of a billion bucks created on the backs of amateurs-on unpaid labor. According to investigate by Charles Clotfelter, an economist at Duke, the normal…」
(ページの作成:「That’s 3-quarters of a billion bucks created on the backs of amateurs-on unpaid labor. According to investigate by Charles Clotfelter, an economist at Duke, the normal…」)