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Frank W. Gallagher, III. (outubro de 2000). "Distant Green Thunderstorms - Frazer's Theory Revisited" 39 (10). American Meteorological Society: 1754–1757. Bibcode:2000JApMe..39.1754G. doi:10.1175/1520-0450-39.10.1754.|data-acceso= require |url= (Axuda)
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