American folk music revival

1952, Anthology of American Folk Music
Wikipedia - "The American folk music revival was a phenomenon in the United States in the 1950s to mid-1960s. Its roots went earlier, of course, since traditional folk music has thousands of years of history, and performers like Burl Ives, Woody Guthrie, and Cisco Houston had enjoyed a limited general popularity in decades prior to the 1950s."
Wikipedia, The Field Recorders' Collective, npr, The 111 Greatest Acts of the Anglo-American
Folk Music Tradition