Widder Fine Arts, Vienna
www.kunsthandelwidder.com
Homepage of the artist Trude Waehner by Dr. Gustav Szekely
www.trudewaehner.com
Written estate of the artist in the Austrian Literature Archive of the Austrian National Library, Vienna
www.onb.ac.at/sammlungen/litarchiv/bestand/sg/nl/waehner.htm
Albertina Collections Online - Trude Waehner
Homepage of the artist Willy Eisenschitz
www.willyeisenschitz.com
Homepage of the Casals Festival in Prades
www.prades-festival-casals.com
Tenement Museum, Orchard Street, New York
www.tenement.org
