1. Ninth Symposium (International) on Combustion;Calcote,1963
2. Tenth Symposium (International) on Combustion;Travers,1965
3. International Symposium on Properties and Applications of Low Temperature Plasmas;Cozens,1965
4. Origin of Excessive Ionization in Flames
5. Eleventh Symposium (International) on Combustion;Bradley,1967