article: Blues
links: Pentatonic scale Bessie Smith Barry White Delta blues Buddy Guy Mamie Smith Etta James Stevie Ray Vaughan United States Big Joe Turner Muddy Waters John Lee Hooker Earl Hooker Little Walter Junior Wells Jimi Hendrix Robert Johnson (musician) B. B. King Eric Clapton Taj Mahal (musician) 20th century Mississippi River Ma Rainey Public Broadcasting Service