BELTJENS, Matthias Josephus Hubertus . (1820-1909)
Compositor Belga-Holandes nacido en Roermond.
Bio
http://composers-classical-music.com/b/BeltjensJos.htm
http://www.organ-biography.info/index.php?id=Beltjens_Joseph_1820
http://www.requiemsurvey.org/composers.php?id=2753
Es autor de un,

Requiem o Missa pro Defunctis, Op.128.Info
Libro
Dies Irae.
http://www.inghist.nl/retroboeken/nnbw/#2%3A66