Deadly Safari: Dutch Student Traveled to Uganda, but NEVER RETURNED | Sophia Koetsier
Wiener Symphoniker // J. Koetsier Concertino für Tuba und Streichorchester op. 77, 3. Satz
Student Vanishes on Safari But Police “Theories” Don’t Make Sense
Koetsier - Brass Symphony [score]
Inside the Mystery of Murchison Falls The Mysterious Case of Sophia Koetsier
The Disappearance of Sophia Koetsier #161
Jan Koetsier - Concerto for 4 trombones and wind orchestra (I. Allegro con brio)
Jan Koetsier – Brass Quintet, Op. 65 | Apex Brass
Jan Koetsier: Sonatina für Trompete und Klavier
Jan Koetsier: »Brass Symphony« / Blechbläser des Gürzenich-Orchester Köln / Matthias Höfs
Jan Koetsier:Brass symphony Op.80
RAF Music | Brass Quintet Op 65 by Jan Koetsier
Jan Koetsier: Concertino
Jan Koetsier - Symphony No. 2 (1947)
Jan Koetsier, 13 Etudes caractéristiques, opus 117, No. 5 - Scott Leger Horn
Jan Koetsier Sonatina for Tuba and Piano
Romanza for Horn and Piano by Jan Koetsier
Sonatina for Horn and Piano, by Jan Koetsier
Slokar Quartet - Live in Tokyo - J. Koetsier: Concertino - 1. Allegro con brio
![Koetsier - Brass Symphony [score]](https://img.youtube.com/vi/yZPaLiFrB7c/0.jpg)
