Yazar
Edward J Helley
8 cilt bulundu.
Edward J. Helley · For sale by the Distribution Branch, Text Products Section, U.S. Geological Survey
13 sayfa · 1985
Computer graphics / Erosion / Maps / Pediments (Geology) / Rock deformation
Edward J Helley · U.S. Dept. of the Interior, U.S. Geological Survey
Sayfa sayısı yok · 1993
Fossil Oysters / Fossils / Oysters, Fossil / Paleontology / Radioactive dating
Edward J Helley · U.S. Dept. of the Interior, U.S. Geological Survey
Sayfa sayısı yok · 1997
Databases / Geology / Geology, Stratigraphic / Stratigraphic Geology
Edward J. Helley · U.S. Dept. of the Interior, U.S. Geological Survey
12 sayfa · 1997
Databases / Geology / Stratigraphic Geology
Edward J Helley · For sale by Open-File Reports Section]
Sayfa sayısı yok · 1994
Geology / Stratigraphic Geology / Databases
Edward J Helley · U.S. Govt. Print. Off.
19 sayfa · 1969
Sedimentation and deposition / Stream measurements