Thewlis, J., ed. Encyclopaedic dictionary of physics: general, nuclear, solid state, molecular, chemical, metal and vacuum physics, astronomy, geophysics, biophysics, and related subjects. New York: Pergamon Press, 1961-1964.

Thewlis, J., ed. Encyclopaedic dictionary of physics: general, nuclear, solid state, molecular, chemical, metal and vacuum physics, astronomy, geophysics, biophysics, and related subjects. New York: Pergamon Press, 1961-1964.