for most of the popular and many obscure yodel songs please check out my new book: YODEL IN HIFI: FROM KITSCH FOLK TO MODERN ELECTRONICA. you can find more info at: http://uwpress.wisc.edu/books/4594.htm

it includes a timeline of the yodel through history from the beginning of time up to the present day and a survey of yodeling per country or region with many surprises

YODEL IN HIFI: FROM KITSCH FOLK TO MODERN ELECTRONICA. you can find more info at: http://uwpress.wisc.edu/books/4594.htm