by Herbert E. Gregory
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Underground water resources of Connectic...
Bibliography of the geology of Connectic...
Report of the director for 1934
Physical and commercial geography
Geology and geography of the Zion Park r...
The Navajo Country: A Geographic and Hyd...
[Resolution for Sergeant-at-Arms to appo...
U.S. Geological Survey
The Pagans
[Memorial of National Institution for pr...
Results of the U.S. Geological Survey's ...
Beyond the hundreth meridian