Nuclear Energy and the Fossil Fuels, M.K. Hubbert, Presented before the Spring Meeting of the Southern District, American Petroleum Institute, Plaza Hotel, San Antonio, Texas, March 7-8-9, 1956 [1]Archiválva2008. május 27-i dátummal a Wayback Machine-ben
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Nuclear Energy and the Fossil Fuels, M.K. Hubbert, Presented before the Spring Meeting of the Southern District, American Petroleum Institute, Plaza Hotel, San Antonio, Texas, March 7-8-9, 1956 [1]Archiválva2008. május 27-i dátummal a Wayback Machine-ben