The Chicago blues reference article from the English Wikipedia on 24-Apr-2004
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Chicago blues

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The Chicago blues is a form of blues music that developed in Chicago by adding electricity, drums, piano, bass guitar and sometimes saxophone to the basic string/harmonica Delta blues.

Blues | Blues genres
Classic female blues - Country blues - Delta blues - Jazz blues - Jump blues - Piano blues
Blues-rock - Soul blues
African blues - British blues - Chicago blues - Detroit blues - Kansas City blues - Louisiana blues - Memphis blues - Piedmont blues - St. Louis blues - Swamp blues - Texas blues - West Coast blues
Musicians
Styles of American folk music
Appalachian | Blues (Ragtime) | Cajun and Creole (Zydeco) | Country (Honky tonk and Bluegrass) | Jazz | Native American | Spiritualss and Gospel | Tejano