Zonal Clipping Update, C16-C20

It's curious that of the ~30 events listed on Inventory of Missing Zonal Clippings, nearly all of them were played during the period 1985-2000. I've noticed this many times before: history that occurred just before or at the beginning of the Internet era is less well documented than both earlier and later history.

Starting with the most recent events first, I looked for available info on the web. While finding a few new clippings, I also found new, relevant info for events from the period that were already documented. For the full table of events, see World Chess Championship Zonals.