United Satates Senate . Committee on Energy and Natural Resources. (1980). Effects of Carbon Dioxide build up in the atmosphere: Hearing before the Committee on Energy and Natural Resources . United States Senate . Ninety Sixth Congress . Second session on Carbon Dioxide build up in the atmosphere. US Govt.

United Satates Senate . Committee on Energy and Natural Resources. Effects of Carbon Dioxide Build Up in the Atmosphere: Hearing Before the Committee on Energy and Natural Resources . United States Senate . Ninety Sixth Congress . Second Session on Carbon Dioxide Build Up in the Atmosphere. Washington: US Govt, 1980.

United Satates Senate . Committee on Energy and Natural Resources. Effects of Carbon Dioxide Build Up in the Atmosphere: Hearing Before the Committee on Energy and Natural Resources . United States Senate . Ninety Sixth Congress . Second Session on Carbon Dioxide Build Up in the Atmosphere. US Govt, 1980.