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ORMISTON, A.R. - New species of Warburgella from the Silurian (Pridolian) and Devonian (Lochkovian) of the Distrct of Franklin and the definition of the Warburgella rugulosa zone.

1981. Geol. Surv. Cananda Bull. 300; pp. 7-14, 1 fig. 1 plt. Orig. extract, stapled, very good, 4to.
EUR 3.00 [Appr.: US$ 3.52 | £UK 2.75 | JP¥ 518] Book number 78926

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