Tappan, H. (1951). Foraminifera from the Arctic Slope of Alaska, General introduction and Part 1, Triassic Foraminifera. United States Geological Survey Professional Papers. 236A: 1-20.
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Tappan, H.
1951
Foraminifera from the Arctic Slope of Alaska, General introduction and Part 1, Triassic Foraminifera
United States Geological Survey Professional Papers