https://www.w3.org/blog/2010/an-update-on-css-21/
An Update on CSS 2.1 | 2010 | Blog | W3C
So where are we (that "we" meaning the CSS Working Group) on CSS 2.1? In short, we're making fast and excellent progress: we are currently resolving the last...
css 2 1an update2010blogw3c
https://www.w3.org/Style/CSS/Test/CSS2.1/20100127/
CSS 2.1 Conformance Test Suite
css 2 1conformance testsuite
https://simonwillison.net/2004/Sep/20/css/
CSS 2.1 Index
The best way of browing the CSS spec. Even better with TypeAhead find.
css 2 1index
https://www.w3.org/news/2003/css-21-working-draft-published/
CSS 2.1 Working Draft Published | 2003 | News | W3C
The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web...
css 2 1working draft2003 newspublishedw3c