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Kobayashi, T. (1934). The Cambro-Ordovician formations and faunas of South Chosen. Palaeontology. Part II. Lower Ordovician faunas. Journal of the Faculty of Sciences of the Imperial University of Tokyo, Section II, Geology, Mineralogy, Geography, Seismology. 3(9): 521-585, pls. 1-8.
Kobayashi, T. (1934). The Cambro-Ordovician formations and faunas of South Chosen. Palaeontology. Part II. Lower Ordovician faunas. Journal of the Faculty of Sciences of the Imperial University of Tokyo, Section II, Geology, Mineralogy, Geography, Seismology. 3(9): 521-585, pls. 1-8.