Foraminifera source request

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Mikhailov, A. V. (1939). К характеристике родов Нижнекаменноугольных фораминифер территорики СССР. Нижнекаменноугольные отложения Северо-западного крыла Подмосковного бассейна - On the characteristics of the genera of the Early Carboniferous foraminifers in the territory of the USSR. In: Maliavkin, S. F. (ed.) The Lower Carboniferous deposits of the North-Western limb of Moscow Basin. ГОНТИ - Symposium n° 3 of the Leningrad geological administration. 3: 47–62 (Russian with English summary).