books.google.es - Basses burbled low, tenors soared, leads wailed, and choruses chanted in harmony in the earliest doowop groups as this cutting-edge early rock 'n' roll music captured the atmosphere of the era, a long-ago sound that touches the emotions even today. Doowop rose out of teen culture on the streets of Chicago...http://books.google.es/books/about/Doowop.html?hl=es&id=j06dhDdsgioC&utm_source=gb-gplus-shareDoowop