Tappan, H. (1962). Foraminifera from the Arctic Slope of Alaska. Part 3, Cretaceous Foraminifera. United States Geological Survey Professional Papers. 236-C: 91-203.
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Tappan, H.
1962
Foraminifera from the Arctic Slope of Alaska. Part 3, Cretaceous Foraminifera
United States Geological Survey Professional Papers