- 9th A.F. Army Air Corp Library and Musseum: http://www.armyaircorpsmuseum.org/wwii_9th_Air_Force.cfm
- 9th Air Force in World War II: http://www.usaaf.com/9thaf/index.htm
- 406th WWII Fighter Group: http://www.406thfightergroup.org/quintessential.php
- Archives of the 9th Air Force Association: http://www.uakron.edu/libraries/archives/collections/finding-aids/9th/
- History of the 9th Air Force: http://9thairforce.org/history.htm
- World War II Archives – 9th Air Force: http://www.wwiiarchives.net/servlet/action/organization/9
WWII Netherlands Escape Lines 