Matsumaru, K.; Furusawa, A. 2007. On orbitolinid Foraminifera from the lower Aptian (Cretaceous) of Hokkaido, Japan. Journal Of The Palaeontological Society Of India 52: 39-44.
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Matsumaru, K.; Furusawa, A.
2007
On orbitolinid Foraminifera from the lower Aptian (Cretaceous) of Hokkaido, Japan