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Mikhailov, A. V. (1939). О палеозойских Ammodiscidae - On the Paleozoic Ammodiscidae. 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: 63-69 (Russian with English summary).
Mikhailov, A. V. (1939). О палеозойских Ammodiscidae - On the Paleozoic Ammodiscidae. 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: 63-69 (Russian with English summary).