Foraminifera source details
Macbeth, J. I.; R. A. M. Schmidt 1973 Upper Cretaceous foraminifera from Ocean Point, northern Alaska. Journal of Paleontology ; 47 (6): 1047–1061.
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Macbeth, J. I.; R. A. M. Schmidt 1973 Upper Cretaceous foraminifera from Ocean Point, northern Alaska. Journal of Paleontology ; 47 (6): 1047–1061
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Eoguttulina gracilis Macbeth & Schmidt, 1973 † (original description)
Pseudopolymorphina arctica Macbeth & Schmidt, 1973 † (original description)
Pseudopolymorphina arctica Macbeth & Schmidt, 1973 † (original description)