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2. G. L. Cann, American Rocket Society Paper Number 2396-62, Berkeley, California (1962).
3. Electrical Discharges in Gases. Part I. Survey of Fundamental Processes
4. The Drift Velocities of Molecular and Atomic Ions in Helium, Neon, and Argon
5. Electrical Conductivity of Thermally Ionized Air Produced in a Shock Tube