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31.
▲
Geophysical Analysis of Aeromagnetic and Gravity Data in Arizona [pdf]
(pubs.usgs.gov)
1 point
graderjs
3 years ago
discuss
32.
▲
Map Projections – A Working Manual (1987) [pdf]
(pubs.usgs.gov)
1 point
Tomte
4 years ago
discuss
33.
▲
Geologic Time: Graphical Representation of Geologic Time
(pubs.usgs.gov)
1 point
th0ma5
15 years ago
discuss
34.
▲
USGS Tapestry of Time and Terrain: Hi-Res Topography and Geology of the U.S
(pubs.usgs.gov)
1 point
thebent
9 years ago
discuss
35.
▲
The United States Geological Survey: 1879-1989
(pubs.usgs.gov)
1 point
tragiclos
16 years ago
discuss