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Choi, Charles Q. Underground river discovered beneath Amazon // OurAmazingPlanet. Science on MSNBC, 31 август 2011. Архивиран от оригинала на 23 ноември 2012. “The name given to the underground flow is not official,” Hamza said.
Choi, Charles Q. Underground river discovered beneath Amazon // OurAmazingPlanet. Science on MSNBC, 31 август 2011. Архивиран от оригинала на 23 ноември 2012. “The name given to the underground flow is not official,” Hamza said.