- Bert van der Waal van Dijk. Administrator. Bert and Judith van der Waal van Dijk.
- Brendan Carroll (International Korngold Society). Korngold Society.
- Brian McMillan (Music Library, Western University, London, ON, Canada). Mahler Rosé Collection.
- Cecilie Schoder (Oslo, Norway). Marie Gutheil-Schoder (1874-1935).
- Christopher Williams (New York, America). Fritz Redlich (1868-1921).
- Danny Teurelincx (Antwerp, Belgium). Royal theater of Antwerp.
- Ehtesham Abdi (Australia).
- Eric Boesten (Goirle, the Netherlands).
- Ernesto Jose Conrad. (Miami, America). Moll family. Carl Julius Rudolf Moll (1861-1945).
- Evžen Zámek (Jihlava, Czech Republic).
- Frank Gent (Exeter, United Kingdom). Henriette Lazarus (1834-1903).
- Frans P de Vries senior (Tape recordings).
- Francisco Bricio (Mexico). Sociedad Mahler México.
- Henry R Mahler (Santa Clara, America). Mahler family.
- Knud Martner (Kopenhagen, Denmark). Laura Hilgermann (1865-1945).
- Hinse Mutter (Amsterdam, the Netherlands). Klavierquartett.
- Johannes Schwarz (Frankfurt am Main, Germany).
- Josef Poukar (Jihlava, Czech Republic).
- Louis Ekstein (Rijswijk, the Netherlands). Gustav Mahler Stichting Nederland.
- Judith van der Waal van Dijk - Schneider. Bert and Judith van der Waal van Dijk.
- Marc van Brabant (Boissevain family). Charles Ernest Henri Boissevain (1868-1940).
- Martin Mege (Temuco, Chile). Maiernigg. 1901-1907 House Gustav Mahler Maiernigg - Villa Mahler No. 31.
- Michelle San Antonio (New York, America).
- Milan Palak (Ostrava, Czech Republic). Theobald Pollak (1855-1912) and Wilhelm Jahn (1835-1900).
- Olga Poukarovi (Jihlava, Czech Republic).
- Paulus Manker (Austria). Alma Mahler.
- Raymond Chan (Toronto, Canada). Gustav Mahler Society Toronto.
- Peter Feyen (Antwerp, Belgium). Antwerp.
- Roger Bogaert (Melle, Gent, Belgium). Research.
- Theo van Breugel (Tilburg, Netherlands). Research.
- Jeffrey B. Berlin (Langhorne, PA, America). Stefan Zweig (1881-1942).
- Wouter van der Waal van Dijk (Tilburg, the Netherlands). DBA.
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Details
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Written by Bert van der Waal van Dijk
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