It was not long before the folk-music category came to include less traditional material and more personal and poetic creations by individual performers, who called themselves "singer-songwriters". As a result of the financial success of high-profile commercial folk artists, record companies began to produce and distribute records by a new generation of folk revival and singer-songwriters—Phil Ochs, Tom Paxton, Eric von Schmidt, Buffy Sainte-Marie, Dave Van Ronk, Judy Collins, Tom Rush, Fred Neil, Gordon Lightfoot, Billy Ed Wheeler, John Denver, Arlo Guthrie, Harry Chapin, John Hartford, and others, among them. Some of this wave had emerged from family singing and playing traditions, and some had not. These singers frequently prided themselves on performing traditional material in imitations of the style of the source singers whom they had discovered, frequently by listening to Harry Smith's celebrated LP compilation of forgotten or obscure commercial 78rpm "race" and "hillbilly" recordings of the 1920s and 30s, the Folkways Anthology of American Folk Music (1951). A number of the artists who had made these old recordings were still very much alive and had been "rediscovered" and brought to the 1963 and 64 Newport Folk Festivals. One of these, Clarence Ashley, for example, introduced folk revivalists to the music of friends of his who still actively played traditional music, such as Doc Watson and The Stanley Brothers.