https://www.mentalfloss.com/article/30669/9-bizarre-weapons-failed-spectacularly

https://www.iwm.org.uk/history/second-world-war-weapons-that-failed

https://www.popularmechanics.com/military/weapons/g1339/10-weapons-that-never-made-it/

https://www.livescience.com/60575-weirdest-military-weapons.html

https://useless.as.uky.edu/items/show/386

https://en.wikipedia.org/wiki/Project_Habakkuk

https://www.weirduniverse.net/blog/comments/albert_bacon_pratts_helmet_gun/