@InCollection{Haehnel:2016:Lexika, author = {Hähnel, Tilo}, title = {{Björk, Mahalia Jackson, Robert Johnson, Al Jolson, Ma Rainey, Ethel Waters}}, booktitle = {{Lexikon der Gesangsstimme. Geschichte, wissenschaftliche Grundlagen, Gesangstechniken, Interpreten}}, publisher = {Laaber}, year = {2016}, editor = {Mecke, Ann-Christin and Pfleiderer, Martin and Richter, Bernhard and Seedorf, Thomas}, series = {Instrumenten-Lexika 5}, address = {Laaber} }