Matching the list of qualified players with the players who eventually showed up for the tournament, then showing how they all qualified, will be a separate exercise.
Using some work on my main blog, Early Chess on the Web, I located the document 'Regulations for the 1997/8 World Championship'. I then added that link and relevant portions to a new page Zonal Qualifiers 1995-1997 (C17). Essentially, it explains the (complicated) structure of the 1997 Groningen tournament, aka 1997 FIDE Knockout Matches.
The regulations plus the list of qualified players plus the clippings from Zonals 1995-1997 (C17), allowed me to work out how most/all(?) of the players qualified for the knockout tournament. For my next post, I'll check this work once more before adding it to the new page on 'Zonal Qualifiers 1995-1997'.