Stratigraphy of the unsaturated zone and uppermost part of the Snake River Plain aquifer at Test Area North, Idaho National Engineering Laboratory, Idaho /

Mode of access: Internet.

Paleontology and nonmarine stratigraphy of the Cuyama Valley badlands, California.

Mode of access: Internet.

Stratigraphy of the bituminous coal field of Pennsylvania, Ohio and West Virginia,

Mode of access: Internet.

Isotopic ages and stratigraphy of Cenozoic rocks of the Marysvale volcanic field and adjacent areas, west-central Utah /

Mode of access: Internet.