Geology topics
H. E. Gregory
Publications and source records attributed to H. E. Gregory.
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
Explore the source record for details and available documents.
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↗