I have finished uploading the Jean Sibelius catalogue to my website, celebrating his 150th anniversary of birth this year.
To complete this work, I made use of the 700 pages, all in strict German, from the volume:
Dahlström, Fabian
Jean Sibelius: thematisch-bibliographisches Verzeichnis seiner Werke
Breitkopf & Härtel, Wiesbaden, 2003
ISBN 3-7651-0333-0
You can see the catalogue here:
http://www.flaminioonline.it/Biografie/Sibelius-catalogo.html