Private collection, California, acquired directly from the artist
Thence by descent
Acquired from the above by the present owner
Rose Slivka, "The New Clay Drawings of Peter Voulkos," Crafts Horizons, October 1974, back cover for a similar example
Rose Slivka, Peter Voulkos: A Dialogue With Clay, New York, 1978, pp. 97, 116, 118 for similar examples