Sources:
http://www.poemhunter.com/siegfried-sassoon/biography/
http://www.exampleessays.com/viewpaper/34190.html
http://en.wikipedia.org/wiki/World_War_I
http://www.ask.com/question/analysis-of-siegfried-sassoon-poetry
http://www.studymode.com/essays/Does-It-Matter-By-Siegfried-Sassoon-1064767.html
http://blogs.swa-jkt.com/swa/10540/2012/04/25/does-it-matter-by-siegfried-sassoon/
http://sumanabala.blogspot.com.au/2012/10/analysis-of-does-it-matter-by-siegfried.html
http://www.poemhunter.com/siegfried-sassoon/biography/
http://www.exampleessays.com/viewpaper/34190.html
http://en.wikipedia.org/wiki/World_War_I
http://www.ask.com/question/analysis-of-siegfried-sassoon-poetry
http://www.studymode.com/essays/Does-It-Matter-By-Siegfried-Sassoon-1064767.html
http://blogs.swa-jkt.com/swa/10540/2012/04/25/does-it-matter-by-siegfried-sassoon/
http://sumanabala.blogspot.com.au/2012/10/analysis-of-does-it-matter-by-siegfried.html