[Ben Tursch, Brussels, Belgium, until 1977]; Fred and Rita Richman, New York, 1977–1988
Capistrano-Baker, Florina H. Art of Island Southeast Asia: The Fred and Rita Richman Collection in The Metropolitan Museum of Art. New York: The Metropolitan Museum of Art, 1994, p. 120.
Kjellgren, Eric. "Guardians of the Longhouse: Art of the Kenyah-Kayan Tradition." Tribal Arts vol. 5 (Summer/Autumn 1999), p. 54.