I would start by applying a style to all those authors names. You can then use that either as the trigger to either gather all names into a TOC or to run a macro that applies index fields to all the entries.

A macro can do all the work very quickly but we would want to see a representative chunk of document so that the code would be structured correctly. If you post a small sample in a word document someone here could write the code you need.

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Andrew Lockton
Chrysalis Design, Melbourne Australia