Nakrem, H. A.; Mork, A. (1990). New Early Triassic Bryozoa (Trepostomata) from Spitsbergen, with some remarks on the stratigraphy of the investigated horizons. Geological Magazine, 128: 129-140
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Nakrem, H. A.; Mork, A.
1990
New Early Triassic Bryozoa (Trepostomata) from Spitsbergen, with some remarks on the stratigraphy of the investigated horizons