The first link listed below, Contrail Science, provides a vast amount of information on contrails. I have listed below it some of the links it, in turn, provides to WWII contrails.
- Contrail Science: http://contrailscience.com/
- Fighter Contrails Over Kent, 1941: http://contrailscience.com/fightercontrails-over-kent-1941/
- Life Magazine Contrail Photos: http://contrailscience.com/life-magazine-contrail-photos/
- Measuring the Height of Contrails: http://contrailscience.com/measuring-the-height-of-contrails/
- Memphis Belle WWII (1944) Contrails: http://contrailscience.com/memphis-belle-wwii-bomber-contrails-1944/
- Some More World War II Contrails: http://contrailscience.com/some-more-wwii-contrails/
- Why Planes Make Vapor Trails: http://contrailscience.com/why-planes-make-vapor-trails/
- World War II Contrails: http://contrailscience.com/wwii-contrails/
WWII Netherlands Escape Lines 