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Kobayashi, T.; Mori, K. (1954). Studies on the Jurassic trigonians in Japan. Part. II. Prosogyrotrigonia and the Trigoniinae. Japanese Journal of Geology and Geography. 25: 155-175.
Kobayashi, T.; Mori, K. (1954). Studies on the Jurassic trigonians in Japan. Part. II. Prosogyrotrigonia and the Trigoniinae. Japanese Journal of Geology and Geography. 25: 155-175.
