Wenlock-Ludlow graptolite biostratigraphy and extinction: a reassessment from the southwestern Iberian Peninsula (Spain and Portugal)

Gutiérrez-Marco, J. C ; Lenz, A. C ; Robardet, M ; Piçarra, J. M

Canadian journal of earth sciences, 1996-05, Vol.33 (5), p.656-663 [Periódico revisado por pares]

Ottawa, Canada: NRC Research Press

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