Bowl:
Helen Drutt Gallery, Philadelphia
Acquired from the above by the present owner, 1985
Bowl: "Rudolf Staffel - Searching for a Light: A Retrospective View 1936-1996," Philadelphia Museum of Art, May 3-August 3, 1997
Paula Winokur and Robert Winokur, "The Light of Rudolf Staffel," Craft Horizons, April 1977, pp. 26-27 for similar examples
Rob Barnard, "Focus: Rudolf Staffel at Temple Gallery," American Craft, December 1989/January 1990, p. 72 for a similar example of the cylinder
Peter Dormer, The New Ceramics: Trends + Traditions, London, 1994, figs. 25-26 for similar examples