- Fragment (Audio, English, duration 02:32): Alma Mahler (1879-1964) about Gustav Mahler (and Gustave Charpentier (1860-1956)'s "Louise").
- Fragment (Audio, German, duration 14:23): Alma Mahler (1879-1964) about the trophies in her house and about Gustav Mahler (1860-1911). Interview by Jimmy Berg in House Alma Mahler New York 1952-1964 (120 East 73d Street), New York.
- Fragment (Video, German, duration 00:56) Alma Mahler (1879-1964) and Agnes Ida Gebauer (1895-1977) arriving at Tulln airport, Vienna (1947, Brumowski Air Base).
All fragments and more on You Tube page Gustav Kaliste.
1940 (published). Alma Mahler (1879-1964): "Gustav Mahler: Erinnerungen and Briefe". Published by Allert de Lange, Amsterdam. Diary. About: Year 1903, 1903 Concert Basel 15-06-1903 - Symphony No. 2, Hermine Kittel (1879-1948) and Willem Mengelberg (1871-1951). Page 71 in print. Médiathèque Musicale Mahler.
Probably 24-10-1903 (and not 24-03-1904): Utrecht, Netherlands. Letter by Friedrich Wilhelm Mengelberg (1837-1919), father of Willem Mengelberg (1871-1951) to Gustav Mahler (1860-1911). 1940 (published). Alma Mahler (1879-1964): "Gustav Mahler: Erinnerungen and Briefe". Published by Allert de Lange, Amsterdam. About concert 1903 Concert Amsterdam 22-10-1903 - Symphony No. 3. Left side: Remarks Alma Mahler. Page 262 in print. Year 1903. Médiathèque Musicale Mahler.
Alma Mahler (1879-1964): "Life and letters of Gustav Mahler". Annotation by Alma Mahler (1879-1964).