The Ordovician system in Canada
Subtitle: correlation chart and explanatory notes
By: by Christopher R. Barnes, B.S. Norford, and David Skevington.
Contributors: Norford, B. S.; Skevington, David.
Series: Publication / International Union of Geological Sciences -- 12
Publisher: IUGS Secretariat; IUGS Editorial Office
Published: 1981
Place of publication: Paris; Ottawa
Language: eng
Notes: 2 fold. charts in end pocket.