Choi، Charles Q. (31 أغسطس 2011). "Underground river discovered beneath Amazon". OurAmazingPlanet. Science on MSNBC. مؤرشف من الأصل في 2012-11-05. "The name given to the underground flow is not official," Hamza said.
Choi، Charles Q. (31 أغسطس 2011). "Underground river discovered beneath Amazon". OurAmazingPlanet. Science on MSNBC. مؤرشف من الأصل في 2012-11-05. "The name given to the underground flow is not official," Hamza said.