New York, 30 August 1979 - Institutional correspondence A letter from Ethen Shein to Richard E. Oldenburg
Oslo, 1938 - Exhibition catalogue Catalogue of the exhibition Henri Matisse, Picasso, G. Braque, Laurens at Kunstnernes Hus, Oslo
New York, 20 October 1939 - Institutional correspondence Anne Beidberg's letter to Alfred H. Barr Jr.