Tate
Tate Online I Map: "Opened by Customs" by Kurt Schwitters
This resource provides the painting "Opened by Customs" by dadaist painter Kurt Schwitters. An image file along with information about the artist and the artwork provide an excellent resource on the topic.
Smithsonian Institution
Smithsonian American Art Museum: Anne Ryan
As part of the Smithsonian Art Museum's database of artists, Anne Ryan is described here along with information on her contributions to art through collages, which she was inspired to make after viewing the work of Kurt Schwitters.
Google Cultural Institute
Google Cultural Institute: Kurt Schwitters
This visual website from Google Cultural Institute shares background information and photos about Kurt Schwitters.
