Bibliography
http://janeaustensworld.wordpress.com/2012/01/08/downton-abbey-season-2-a-world-war-one-guide-to-rats-shell-shock-and-barbed-wire/
http://www.militaryfactory.com/imageviewer/ar/pic-detail.asp?armor_id=582&sCurrentPic=pic6
http://en.wikipedia.org/wiki/Medium_Mark_A_Whippet#mediaviewer/File:Whippet.jpg
http://en.wikipedia.org/wiki/A7V#mediaviewer/File:A7v-wotan-diorama.jpg
http://www.worldwar1.com/heritage/bbertha.htm
http://www.207squadron.rafinfo.org.uk/ww1/dunkirk.htm
http://www.militaryfactory.com/armor/ww1-artillery.asp
http://janeaustensworld.wordpress.com/2012/01/08/downton-abbey-season-2-a-world-war-one-guide-to-rats-shell-shock-and-barbed-wire/
http://www.militaryfactory.com/imageviewer/ar/pic-detail.asp?armor_id=582&sCurrentPic=pic6
http://en.wikipedia.org/wiki/Medium_Mark_A_Whippet#mediaviewer/File:Whippet.jpg
http://en.wikipedia.org/wiki/A7V#mediaviewer/File:A7v-wotan-diorama.jpg
http://www.worldwar1.com/heritage/bbertha.htm
http://www.207squadron.rafinfo.org.uk/ww1/dunkirk.htm
http://www.militaryfactory.com/armor/ww1-artillery.asp