An account of the ordovician rocks of the Shelve Inlier in west Salop and part of north Powys /

Lower Ordovician Brachiopoda from the Tourmakeady Limestone, Co. Mayo, Ireland /
by: Williams, Alwyn
Published: (1985)

Early Ordovician (Arenig) stratigraphy and faunas of the Carmarthen district, south-west Wales /
by: Fortey, Richard A.
Published: (1978)

The Caradoc faunal associations of the area between Bala and Dinas Mawddwy, north Wales /
by: Lockley, M. G.
Published: (1980)

Revised phylogeny and functional interpretation of the edrioasteroidea based on new taxa from the Early and Middle Ordovician of western Utah /
by: Guensburg, Thomas Edgar
Published: (1994)

The Middle and Upper Ordovician rocks of Michigan.
by: Hussey, Russell C. (Russell Claudius), 1888-
Published: (1952)

Phosphatic microfossils from the Ordovician of the United States /
by: Nitecki, Matthew H.
Published: (1975)

The Upper Ordovician fauna of Frobisher bay, Baffin Land /
by: Roy, Sharat Kumar, 1897-1962
Published: (1941)

The Cambrian-Ordovician boundary : sections, fossil distributions, and correlations /
Published: (1982)

Ordovician trilobites of Argentina /
by: Harrington, Horacio Jaime, 1910-
Published: (1957)

The Ordovician trilobites of Spitsbergen /
by: Fortey, Richard A.
Published: (1974)

Conodont evolution and biostratigraphy of the Upper Cambrian and lowest Ordovician /
by: Miller, James Frederick, 1943-
Published: (1971)

Catalog of fossils from the Middle and Upper Ordovician of Oklahoma.
by: Amsden, Thomas William
Published: (1957)

Lower Palaeozoic green algae from southern Scotland, and their evolutionary significance.
by: Elliott, Graham F. (Graham Francis)
Published: (1972)

Leperditicopid ostracodes from Ordovician rocks of Kentucky and nearby states and characteristic features of the Order Leperditicopida /
by: Berdan, Jean Milton
Published: (1984)

The Arenig Series in South Wales : stratigraphy and palaeontology.
Published: (1987)

The trilobite fauna of the Raheen Formation (upper Caradoc), Co. Waterford, Ireland /
by: Owen, A. W.
Published: (1986)

New trilobites from the Maquoketa beds of Fayette county, Iowa /
by: Slocom, Arthur Ware, 1860-
Published: (1913)

Echinoderms from Middle and Upper Ordovician rocks of Kentucky : descriptions and illustrations of nine species of Stylophora, Paracrinoidea, Inadunata, Cyclocystoidea, and Rhombifera /
by: Parsley, Ronald L.
Published: (1981)

The Lower Ordovician gastropod Ceratopea /
by: Yochelson, Ellis L. (Ellis Leon), 1928-2006, et al.
Published: (1957)

The Middle and Upper Ordovician conodont faunas of Minnesota /
by: Webers, Gerald F., 1932-
Published: (1966)

Silicified Middle Ordovician trilobites /
by: Whittington, H. B. (Harry Blackmore)
Published: (1953)

The great Ordovician biodiversification event /
Published: (2004)

A monograph of the British Ordovician and Silurian Bellerophontacea /
by: Reed, F. R. C. (Frederick Richard Cowper), 1869-

Upper Bromide Formation and Viola Group (Middle and Upper Ordovician) in eastern Oklahoma.
Published: (1983)

Aspects of the Ordovician system /
Published: (1984)

Review of Ordovician pelecypods.
by: Pojeta, John, Jr
Published: (1971)

Lower Ordovician trilobites from western Utah and eastern Nevada.
by: Hintze, Lehi F.
Published: (1952)

Ordovician paleontology of the northern Hudson Bay lowland.
by: Nelson, Samuel J.
Published: (1963)

Notes on two Ordovician ostracods from Estonia /
by: Kesling, Robert V. (Robert Vernon), 1917-2005
Published: (1955)

Ordovician streptelasmid rugose corals from Michigan.
by: Stumm, Erwin Charles, 1908-1969
Published: (1963)

Distribution of the Middle Ordovician Copenhagen formation and its trilobites in Nevada /
by: Ross, Reuben James, 1918-, et al.
Published: (1972)

Middle and Late Ordovician solitary rugose corals of the Cincinnati Arch region /
by: Elias, Robert J.
Published: (1983)

Preliminary studies of the ultrastructure of selected Ordovician conodonts /
by: Barnes, Christopher R.
Published: (1970)

Early Middle Ordovician Chazy trilobites of New York /
by: Shaw, Frederick C., 1937-
Published: (1968)

Teiichispira, a new early Ordovician gastropod genus /
by: Yochelson, Ellis L. (Ellis Leon), 1928-2006, et al.
Published: (1968)

The Ordovician system in Greenland and South Africa : correlation charts and explanatory notes /
Published: (1994)