Mozart: Muzikaal Cultureel Bericht vol. 11, no. 1 (Beek-Ubbergen Mozart(k)ring Gelre-Niederrhein, 1999)
Ton Koopman [beschermheer van Mozart(k)ring] -- Constanze Nissen-Mozart in Salzburg / R. Angermüller -- De glasharmonica / E. von Holtz
Keywords: Mozart, Wolfgang Amadeus -- 1756-1791; Weber, Constanze -- 1763-1842; Koopman, Ton -- 1944-; 18th Century (1701-1800); Concerto; Horn; Glass harmonica; Salzburg (Austria)