Breaching Containment
I've gathered a lot of fun sources doing research for Demain, so I'm going to put them here for my own reference, as well as just for fun! Feel free to poke through them; I tried to list the most accessible ones in terms of technical language and being open access.
19th Century Resources
I use these ones pretty often, for primary source information or just so I can look at the pictures lol
Contemporary Resources
More recent stuff that I use directly for Demain