Well, there aren't many, as yet. Most other groups who have worked in the area aren't on the web, though this is starting to change quite quickly as of late 1998. However, this is where such links will appear, in their own good time. We're hoping to find sites for such relevant things as Austrian geology, mapping, and even (I expect) tourist info.
Watch this space :-)

The principal reference is to the local group Verein füur Höhlenkunde im Obersteier
Other groups who have worked in area 1623:
Arbeitsgemeinschaft Höhle und Karst Grabenstetten e.V.
This group is still active in the area and cooperating with CUCC
Lancaster University Speleological Society
had expeditions in 1987,88,89 (but no info on their website).
LUSS Expeditions pages (mostly Picos de Europa material)
University of Leeds Speleological Association have worked in the adjacent Tauplitz area in the mid-eighties.

UK Groups whose members (mainly also members of CUCC at the time) have taken some part in CUCC expeditions: Bradford Pothole Club
Cave Diving Group
Craven Pothole Club
Northern Pennine Club
(This list is very incomplete, as yet)

Local Groups for adjacent areas:
Landesverein für Höhlenkunde in Oberosterreich have a site describing the adjacent 1626 area, just a few kilometres across the plateau from us. Text in English or German.
To our south in the Dachstein, the local group is Landesverein für Höhlenkunde in Oberosterreich

Geology, Mapping, Aerial photography, Alpine Clubs (for huts etc.):
Austrian Geological Survey