- http://www.firstworldwar.com/weaponry/flamethrowers.htm
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2376985/
- http://www.firstworldwar.com/weaponry/gas.htm
- http://www.health.ny.gov/environmental/emergency/chemical_terrorism/chlorine_general.htm
- http://www.bt.cdc.gov/agent/phosgene/basics/facts.asp
- http://www.historylearningsite.co.uk/memories_from_the_trenches.htm
- http://www.telegraph.co.uk/news/newstopics/howaboutthat/7697251/Secret-terror-weapon-of-the-Somme-battle-discovered.html
- http://www.1914-1918.net/intrenches.htm
- Briggs, Josh. "How Mustard Gas Works." HowStuffWorks. HowStuffWorks.com, 13 May 2008. Web. 25 Apr. 2014.
- "Front Line: Life in the Trenches of WWI." Front Line: Life in the Trenches of WWI. N.p., n.d. Web. 25 Apr. 2014