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Hass, Wilbert H.

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Conodonts, Barnett Formation (Mississippian): Texas. Plate 15, in U.S.Geological Survey Professional paper 243-F. 1952.
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Conodonts, Barnett Formation (Mississippian): Texas. Plate 16, in U.S.Geological Survey Professional paper 243-F. 1952.
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Conodonts, Barnett Formation (Mississippian): Texas. Plate 14, in U.S.Geological Survey Professional paper 243-F. 1952.
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