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Ottaway, Professor Marina; Ottaway, David; Ottaway, Marina (December 15, 1970). "Algeria: The Politics of a Socialist Revolution". University of California Press. Archived from the original on May 21, 2024. Retrieved December 15, 2019 – via Google Books.
Assessment, United States Congress Office of Technology (1977). Transportation of Liquefied Natural Gas. Congress, Office of Technology Assessment. Archived from the original on 2023-04-04. Retrieved 2022-11-24.