*Rhode RV, Pearson HA: [http://naca.central.cranfield.ac.uk/reports/1942/naca-wr-l-474.pdf Condensation trails – where they occur and what can be done about them]. National Advisory Committee for Aeronautics, report NACA-WR-L-474, September 1942 | *Rhode RV, Pearson HA: [http://naca.central.cranfield.ac.uk/reports/1942/naca-wr-l-474.pdf Condensation trails – where they occur and what can be done about them]. National Advisory Committee for Aeronautics, report NACA-WR-L-474, September 1942 |