Incoming Resources
- The crossbow, mediaeval and modern, military and sporting, its construction, history & management : with a treatise on the balista and catapult of the ancients, and an appendix on the catapult, balista & the Turkish bow, by Sir Ralph Payne-Gallwey
- Rubber band engineer, build slingshot-powered rockets, rubber band rifles, unconventional catapults, and more guerrilla gadgets from household hardware, Lance Akiyama
- Catapult, Harry and I build a siege weapon, Jim Paul