yes, the Rounder disc. I came in on the Gladden cd from google and was confused for awhile. At Amazon.com, put Texas Gladden in Popular music search and "Ballad Legacy: The Alan Lomax Portait Series" comes up. Scroll down to "Samples, and at the bottom of the list click on "See all 37 tracks...."
I checked Amazon.co.uk and the list of 37 is there with indication of audio clips on all. The title is listed as "Portraits, Texas Gladden," not confusing like the .com heading at the US site.