Vicki, if you send me an email, I can send you a copy of Carolina Cotton doing Mockingbird Yodel if that would be of use to you. dale8r AT hotmail.

An album of her music is available at itunes and likely other places as well.

As an aside, here is a nice bio of Carolina Cotton (Helen Hagstrom) 1925-1997 who was originally from Cash, AR. http://www.rockabillyhall.com/CarolinaCotton.html