Highlights
https://timesmachine.nytimes.com/timesmachine/1918/08/26/97021408.pdf
https://timesmachine.nytimes.com/timesmachine/1918/08/27/97021702.pdf
https://timesmachine.nytimes.com/timesmachine/1918/08/28/97022080.pdf
https://timesmachine.nytimes.com/timesmachine/1918/08/28/97022172.pdf
https://timesmachine.nytimes.com/timesmachine/1918/08/29/97022393.pdf
https://timesmachine.nytimes.com/timesmachine/1918/08/30/97022850.pdf
https://timesmachine.nytimes.com/timesmachine/1918/09/01/97023380.pdf
https://timesmachine.nytimes.com/timesmachine/1918/09/01/97023386.pdf
http://centenaire.org/en/autour-de-la-grande-guerre/aviation/history-us-air-service-world-war-i
http://www.theaerodrome.com/services/usa/index.php
http://greatwarproject.org/2018/08/19/planning-the-war-of-1919/
http://www.edwardlengel.com/fiery-finale-doughboys-battle-to-the-death-at-fismette-1918/
https://www.facebook.com/EdwardLengelAuthor/
http://www.edwardlengel.com/about/
https://www.legion.org/convention
https://variety.com/2018/gaming/news/memories-retold-elijah-wood-1202834748/
https://www.youtube.com/watch?v=x6cYeBO8zwc
https://www.youtube.com/watch?v=2sP6BYe2LE4
https://www.engr.ncsu.edu/news/2017/05/26/above-the-battlefields-of-world-war-i/
https://en.wikipedia.org/wiki/Observation_balloon
https://en.wikipedia.org/wiki/History_of_military_ballooning#World_War_I
https://mashable.com/2016/03/02/wwi-balloons/#nGRfpJmxX8qR
https://www.theatlantic.com/photo/2014/04/world-war-i-in-photos-aerial-warfare/507326/
https://www.jstor.org/stable/3087941?mag=doughboy-slang&seq=7#page_scan_tab_contents
http://www.worldwar1.com/dbc/balloon43.htm
http://www.worldwar1centennial.org/index.php/communicate/2015-12-28-18-26-00/subscribe.html