@book{13424, author = {Fitzgerald, Donald R.}, title = {Some theoretical aspects of the relation of surface electric field observations to cloud charge distributions}, publisher = {The University of Chicago,}, year = {1957}, series = {Cloud electricity scientific report}, address = {Illinois:}, note = {This research has been supported by the Geophysics Research Directorate, Air Force Cambridge Research Center, Air Research and Development Command, under Contracts AF 19(604)-618, AF 19(604)-1552, and AF 19(604)-2189} }