Narbonne, G. M.; Gibling, M. R.; Jones, B. (1979). Polarichnus, a new trace fossil from Siluro-Devonian strata of Arctic Canada. Journal of Paleontology. 53(1): 133-141.
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Narbonne, G. M.; Gibling, M. R.; Jones, B.
1979
Polarichnus, a new trace fossil from Siluro-Devonian strata of Arctic Canada