The graptolite correlation of the North American Upper...

The graptolite correlation of the North American Upper Ordovician Standard

Stig M. Bergström, Charles E. Mitchell
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Volume:
19
Year:
1986
Language:
english
Pages:
20
DOI:
10.1111/j.1502-3931.1986.tb00739.x
File:
PDF, 1.47 MB
english, 1986
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