I made a couple of one-page websites going over sources relating to controversies of socialist states. There's an unfortunate tendency to regard source collectives as individual sources, but I still thought it would be convenient to have sites you can share for when the issue is brought up for the 1000th time (for issues that can't be resolved with a single source). I've read/watched everything on the sites, so to tell me if you have any questions/suggestions.
The Tiananmen Square Protests (6-4 incident)
These resources should be added to the sidebar of some comm because a couple months from now this post will disappear.