From The Washington Post blog:
Hazel Dickens, a West Virginia-born bluegrass singer who was an authentic voice of America’s working class, has died in Washington at 75. […]
Her uncompromising songs about coal mining, such as “Black Lung” and “They Can’t Keep Us Down,” became anthems, and she was among the first to sing of the plight of women trying to get by in the working-class world. She was a longtime Washington resident and became a key influence on such later singing stars as Emmylou Harris, Allison Krauss and the Judds.
• Hazel Dickens: http://en.wikipedia.org/wiki/Hazel_Dickens