Foraminifera source request

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Poyarkov, B. V. (1965). Систематика и филогения рода Mediocris Rozovskaja, 1961 - Systematics and phylogeny of the genus Mediocris Rozovskaya, 1961. Академия наук СССР Вопросы микропалеонтологии - Academy of Sciences USSR Questions of Micropaleontology. 9: 89-110.