The Navajo country : a geographic and hydrographic reconnaissance of parts of Arizona, New Mexico, and Utah /
by Herbert E. Gregory.
- Washington : Govt. Print. Off., 1916.
- 219 p., 29 pages of plates (some folded) : ill., maps ; 24 cm.
- United States Geological Survey. Water-supply paper ; 380 .
- Water-supply paper (Washington, D.C.) ; 380. .