machines/howtos/create-a-bench-with-2x4-beams/references.md

Articles

https://pri-plastics.com/understanding-plastic-extrusion-a-comprehensive-guide/
https://www.[filtered].earth/news/extrusion-machine

Books

https://www.barnesandnoble.com/w/extrusion-harold-f-giles-jr/1111448551

YouTube

https://www.youtube.com/watch?v=tGc-Z7TtiVg
https://www.youtube.com/watch?v=1A05nDBKzVc
https://www.youtube.com/watch?v=9Hmp4K3NwB0

Opensource Designs

https://community.preciousplastic.com/library/make-a-bench-with-beams