Blues aficionados have got to be loving Hip-O’s ongoing series of programs culled from the American Folk Blues Festival tours that came to Europe annually throughout most of the ’60s. The promoters (two Germans) presciently recorded the proceedings and their efforts have, decades later, given us some of the most pristine visual relics of classic blues available today. The personnel on just one track, Helen Humes’ “The Blues Ain’t Nothin’ But A Woman,” is the stuff of dreams: T-Bone Walker, Willie Dixon, Memphis Slim. Sonny Terry and Brownie McGhee all offer support. A young Buddy Guy makes a few appearances, and legendary elders such as Big Joe Turner, Son House, Hound Dog Taylor, Little Walter and Muddy Waters are all featured artists. The opening track, the great Big Mama Thornton belting her pre-Elvis version of “Hound Dog,” is a whopper of an intro, and yes, that’s Guy supplying her guitar licks. Boasting superb sound and image, this is a keeper.