Zone à avicula contorta; ou, Étage rhaetien; état de la question.

Mode of access: Internet.

Geognostische Darstellung des niederschlesisch-böhmischen Steinkohlenbeckens

Mode of access: Internet.

Report on the boundary between the Potsdam and Pre-Cambrian rocks north of the Adirondacks.

From 16th annual report of the state geologist, 1898.

Lethaea geognostica. Handbuch der erdgeschichte mit Abbildungen der für die formationen bezeichnendsten Versteinerungen.

Atlas to accompany pt. 1, v. 1, has also special t.-p.: Lethaea Palaeozoica, oder Beschreibung und Abbildung der für die einzelnen Abtheilungen der palaeozoischen formation bezeichnendsten Versteinerungen. Von Ferd. Roemer.

Description géologique du Jura bernois et de quelques districts adjacents compris dans la feuille VII de l'atlas fédéral,

Added t.-p. has title: Jura bernois et districts adjacents.

Lower and middle Cambrian formations of the Mohave desert,

Mode of access: Internet.

The correlation of the pre-Cambrian rocks of the region of the Great Lakes,

Mode of access: Internet.

Age of strata referred to the Ellensburgh formation in the White Bluffs of the Columbia river.

Mode of access: Internet.

Biostratigraphic studies of the Niagaran inter-reef formations in northeastern Illinois.

Bibliography: p. 143-146.

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

Mode of access: Internet.

The Martinsburg formation (Middle and Upper Ordovician) in the Delaware Valley, Pennsylvania-New Jersey /

Prepared in cooperation with the Pennsylvania Geological Survey.

Lexicon of geologic names of the United States for 1936-1960 /

Mode of access: Internet.

The Keuper marls around Charnwood.

Pub. by the Leicester literary and philosophical society.

The Yorkshire Lias /

"Literature of Yorkshire Lias": p. 5-11.

Beitrag zur Kenntniss des Jura in Deutsch-Lothringen,

Each plate accompanied by leaf with descriptive letterpress.