12.6 References
Karl Fulton
American Welding Society. (n.d.). ANSI Z49.1: Safety & health: Standards. https://www.aws.org/standards/page/ansi-z491
Iivonen, K. (2005, August 5).
Acetylene is discovered by Edmund Davy. Gasworld. https://www.gasworld.com/story/acetylene-is-discovered-by-edmund-davy/2075609.article/
Maes, J. (n.d.).
How to anneal aluminum: The beginner’s guide. Make It from Metal. https://makeitfrommetal.com/how-to-anneal-aluminum-the-beginners-guide/
Navy, U. (2019). Steelworker (Vol. 1).