Dorthe Falcon Møller; Thomas Munck (March 1984). "C. C. Hornung and the Single-Cast Iron Frame: An Early Break-Through in the Danish Piano Industry". The Galpin Society Journal. 37: 48–56. doi:10.2307/841139. JSTOR841139.
jstor.org
Dorthe Falcon Møller; Thomas Munck (March 1984). "C. C. Hornung and the Single-Cast Iron Frame: An Early Break-Through in the Danish Piano Industry". The Galpin Society Journal. 37: 48–56. doi:10.2307/841139. JSTOR841139.