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By "Purnell, Mark A. (Mark Andrew), 1964-"
Conodonts of the Lower Border group and equivalent strata (lower carboniferous) in Northern Cumbria and the Scottish Borders, U.K. /
By: Purnell, Mark A. - Royal Ontario Museum.
Publication info: Toronto :Royal Ontario Museum,1992.
Contributed by: Royal Ontario Museum (archive.org)