Author: WESTROP, S.R. ET AL.
Title: Lower Ordovician (Ibexian) trilobites from the Tribes Hill Formation, central Mohawk Valley, New York State.
Description: 1993. Can. J. Earth Sci. 30; pp. 1618-1633, 11 fig. 3 plts. Attached: Adrain & Chatterton: New rorringtoniid trilobite from the Ludlow of Arctic Canada: pp. 1634-1643, 2 fig. 2 plts. Orig. wrps. stapled extract, 4to.

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