Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Mary Travers:

"

The Song Swappers sang backup for Pete Seeger on four reissue albums in 1955, when Folkways Records reissued a collection of Seeger's pro-union folk songs, "Talking Union". Travers regarded her singing as a hobby and was shy about it, but was encouraged by fellow musicians.[1] She also was in the cast of the Broadway show The Next President.[2]