Concepedia

Geology of the Navajo country: A reconnaissance of parts of Arizona, New Mexico, and Utah

H. E. Gregory

USGS professional paper · 1917 · 68 citations · 2 references

DOIFull text

Open access

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References

2

Tertiary history of the Grand Canyon district

Carl E. Dutton · American Journal of Science · 1882 · 70 citations · Full text

, , +13

Report upon the Colorado River of the West

Asa Gray · 1861 · 31 citations

, , +12