Zonal Clipping Update, C20-C26

I tackled the first of the actions from the previous post, Zonal Index Update, i.e. 'Look for missing events on the pages of zonal clippings'; found 11 new crosstables; and added them to the relevant pages of clippings -- C20 : 2001-02, C21 : 2002-04, C22 : 2004-05, C23 : 2006-07, C25 : 2010-11, and C26 : 2012-13. With a few exceptions, the crosstables were found on ratings.fide.com.