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Electrical Coronas, L. L. Loeb (University of California Press, 1965).

Elements of Nuclear Physics, W. E. Meyerhof (McGraw-Hill, 1967).

Cosmic Rays, B. B. Rossi (McGraw-Hill, 1964).

Introduction to Nuclear Engineering, J. R. Lamarsh (Addison-Wesley, 1983).

Cosmic Rays at Ground Level, Wolfendale (Institute of Physics: London, 1973).

An Atlas of Typical Expansion Chamber Photographs, W. Gentner (Pergamon Press, 1954).