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bookAt: Osnovy Paleontol., Moscow, Izdateľstvo Akademii Nauk SSSR, [15] By: Bolkhovitina N. A.
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journalAt: Analele ştiinţifice ale Universităţii “Al. I. Cuza” din Iaşi, Section, Serie Nouă, Secţiunea 2.b, Geologie-Geografie, 1978, 24 By: Olaru L.