Geology topics
H. E. Gregory
Publications and source records attributed to H. E. Gregory.
The San Juan country, a geographic and geologic reconnaissance of southeastern Utah
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Professional Paper↗
Geology of the Navajo country: A reconnaissance of parts of Arizona, New Mexico, and Utah
No abstract available.
Arizona, New Mexico, Utah↗
Ground water in the Waterbury area, Connecticut
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Water Supply Paper↗
Contributions to economic geology, 1909, part II, mineral fuels--Petroleum and natural gas
No abstract available.
Bulletin↗
Contributions to economic geology, 1909, part II, mineral fuels--Coal and lignite
No abstract available.
Bulletin↗