 The expanding market in LP records increased the availability of folk-music field recordings originally made by John and Alan Lomax, Kenneth S. Goldstein, and other collectors during the New Deal era of the 1930s and 40s.Small record labels, such as Yazoo Records, grew up to distribute reissued older recordings and to make new recordings of the survivors among these artists.This was how many urban white American audiences of the 1950s and 60s first heard country blues and especially Delta blues that had been recorded by Mississippi folk artists 30 or 40 years before.