Avkhimovitch, Violetta I. Middle and Upper Devonian miospore zonation of eastern Europe - Pau Centres de Recherches Exploration-Production Elf-Aquitaine Juin 1993 - pp. 79-147 26 láms. ISSN: 0396-2687 Subjects--Topical Terms: BIOESTRATIGRAFIADEVONICOMIOSPORA Subjects--Geographic Terms: RUSIA