- Gregg Centre for the Study of War and Society, University of New Brunswick, Canada: http://www.unb.ca/fredericton/arts/centres/gregg/
- Hoover Institution, Stanford University, Stanford, California: http://www.hoover.org/
- Second World War Experience Centre: http://www.war-experience.org/index.html
- The American Soldier in WWII: https://www.zooniverse.org/projects/tkotwim/the-american-soldier and American Soldier in WWII Subject Index and Codebooks: https://hollisarchives.lib.harvard.edu/repositories/4/resources/7430
WWII Netherlands Escape Lines 