Why weren't there shell shocked soldiers before WW1? - Quora

BBC Inside Out - Shell Shock

The Forgotten Female Shell-Shock Victims of World War I - The Atlantic

War office report on 'Shell shock' - The National Archives

Images of shell shock, with different neurological manifestation

Seeing Orange: What Caught Commenters' Eyes About a Small Syrian Boy in a Big Chair - The New York Times

Shell Shock: Traumatic Neurosis and the British by Leese, P.

Shell shock - Definition, Meaning & Synonyms

WWII Post Traumatic Stress, The National WWII Museum

Post-Traumatic Stress Disorder (PTSD) in Canada

A Brief History of Wartime PTSD - From Ancient Greece to Afghanistan