References
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"12 Technological Advancements Of World War I". Mental Floss. N.p., 2016. Web. 6 May 2016.
"A History Of Fighter Aircraft". Usaww1.com. N.p., 2016. Web. 6 May 2016.
"First World War.Com - Weapons Of War: Poison Gas". Firstworldwar.com. N.p., 2009. Web. 6 May 2016.
Fitzgerald, G. J. "Chemical Warfare And Medical Response During World War I". American Journal of Public Health 98.4 (2008): 611-625. Web. 6 May 2016.
gas, Germans. "Germans Introduce Poison Gas - Apr 22, 1915 - HISTORY.Com". HISTORY.com. N.p., 2016. Web. 6 May 2016.
"Machine Gun". Wikipedia. N.p., 2016. Web. 6 May 2016.
"The Machine-Gun". Spartacus Educational. N.p., 2016. Web. 6 May 2016.
"12 Technological Advancements Of World War I". Mental Floss. N.p., 2016. Web. 6 May 2016.
"A History Of Fighter Aircraft". Usaww1.com. N.p., 2016. Web. 6 May 2016.
"First World War.Com - Weapons Of War: Poison Gas". Firstworldwar.com. N.p., 2009. Web. 6 May 2016.
Fitzgerald, G. J. "Chemical Warfare And Medical Response During World War I". American Journal of Public Health 98.4 (2008): 611-625. Web. 6 May 2016.
gas, Germans. "Germans Introduce Poison Gas - Apr 22, 1915 - HISTORY.Com". HISTORY.com. N.p., 2016. Web. 6 May 2016.
"Machine Gun". Wikipedia. N.p., 2016. Web. 6 May 2016.
"The Machine-Gun". Spartacus Educational. N.p., 2016. Web. 6 May 2016.