สงครามโลกครั้งที่ 1-pdf
Hutchinson, J. R. et al., 2011. From Flat Foot to Fat Foot - Structure, Ontogeny, Function, and Evolution of Elephant “Sixth Toes”
Trench Warfare:. Life in the Trenches: Possibilities of drowning in mud Very uncomfortable Inhaling toxic and corrosive gases Being overrun by huge rats.
