Welcker Max (1878 - 1954)Compositor Aleman nacido en Asburgo .
Bio
http://www.musicanet.org
http://www.requiemsurvey.org/composers.php?id=1208
autor de

Requiem, opus 106
for choir unisono (or solo) and organ.
Source:http://www.bodensee-musikversand.de/product_info.php?products_id=116116
y de

Requiem und Libera
Requiem y Libera opus 200 para soprano, contralto, barítono ad libitum y órgano) This Requiem und Libera, opus 200, is for soprano, contralto, barítono ad libitum and organ.
Source:http://webdelamusica.com/agenda/coral.htm