Williams, Earle R. (1 August 2010). "Origin and context of C. T. R. Wilson's ideas on electron runaway in thunderclouds". Journal of Geophysical Research: Space Physics. 115 (A8): A00E50. Bibcode:2010JGRA..115.0E50W. doi:10.1029/2009JA014581. ISSN2156-2202.
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Williams, Earle R. (1 August 2010). "Origin and context of C. T. R. Wilson's ideas on electron runaway in thunderclouds". Journal of Geophysical Research: Space Physics. 115 (A8): A00E50. Bibcode:2010JGRA..115.0E50W. doi:10.1029/2009JA014581. ISSN2156-2202.
Williams, Earle R. (1 August 2010). "Origin and context of C. T. R. Wilson's ideas on electron runaway in thunderclouds". Journal of Geophysical Research: Space Physics. 115 (A8): A00E50. Bibcode:2010JGRA..115.0E50W. doi:10.1029/2009JA014581. ISSN2156-2202.