"Rio Grande River". Encyclopædia Britannica. Retrieved May 18, 2016. In some places the depth of the river has varied from nearly 60 feet (18 metres) to a bare trickle or nothing.
Brand, Donald Dilworth; Schmidt, Robert H. "Rio Grande". Encyclopaedia Britannica. Retrieved September 9, 2020.
Repasch, Marisa; Karlstrom, Karl; Heizler, Matt; Pecha, Mark (May 2017). "Birth and evolution of the Rio Grande fluvial system in the past 8 Ma: Progressive downward integration and the influence of tectonics, volcanism, and climate". Earth-Science Reviews. 168: 113–164. Bibcode:2017ESRv..168..113R. doi:10.1016/j.earscirev.2017.03.003.
Ballenger, Jesse; Holliday, Vance; Sanchez, Guadelupe (2017). Mills, Barbara; Fowles, Severin (eds.). The Earliest People in the Southwest. Vol. 1. doi:10.1093/oxfordhb/9780199978427.013.11.
encyclopediaofsantafe.com
"Rio Grande". Encyclopedia of Santa Fe. Archived from the original on May 8, 2021. Retrieved June 28, 2017.
Repasch, Marisa; Karlstrom, Karl; Heizler, Matt; Pecha, Mark (May 2017). "Birth and evolution of the Rio Grande fluvial system in the past 8 Ma: Progressive downward integration and the influence of tectonics, volcanism, and climate". Earth-Science Reviews. 168: 113–164. Bibcode:2017ESRv..168..113R. doi:10.1016/j.earscirev.2017.03.003.