1. Stewart Jr TW. Common otolaryngologic problems of flying. Am Fam Physician. 1979;19:113–9.
2. Backus JL. Letter from Amelia 1901–1937. Boston: Beacon; 1982.
3. Campbell PA. Aerosinusitis – its course, cause and treatment. Ann Otol. 1944;55:291–301.
4. Sakai S. Winged samurai. Tokyo: Kohjin-sha; 1970. p. 151–3.
5. 458th Bombardment Group (H). http://www.458bg.com/crewperkinson.htm . Accessed Oct 2012.