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Howard, Keith A.. (2008). Special Paper 439: Late Cenozoic Drainage History of the Southwestern Great Basin and Lower Colorado River Region: Geologic and Biotic Perspectives Volume 439 || Age, distribution, and formation of late Cenozoic paleovalleys of the lower Colorado River and their relation to river aggradation and degradation. , (), 391–410. doi:10.1130/2008.2439(18) 
10.1130/2008.2439(18)