The Ordovician system in the United States
Subtitle: correlation chart and explanatory notes
By: by Reuben J. Ross Jr. [and others]
Contributors: International Union of Geological Sciences. International Subcommission on Ordovician Stratigraphy
Series: Publication / International Union of Geological Sciences -- no. 12; IUGS publication -- no. 12
Publisher: Available from IUGS Secretariat
Published: 1982
Place of publication: Paris, France
Language: eng
Number of pages: 73
Subjects: Stratigraphic Geology; Geology
Notes: Cover title.

"July 4, 1982."

"Sponsored by the International Subcommission on Ordovician Stratigraphy."

Three folded charts in pocket.

Bibliography: p. 53-73.