Stratigraphy and brachiopods of the Ordovician and Lower Silurian of the Gorny Altai. Rossiiskaya Akademiya Nauk Sibirskoe Otdelenie Trudy Instituta Geologii i Geofiziki, 717 1989: 1-224. 116 [Zoological Record Volume 128]
Stratigraphy and brachiopods of the Ordovician and Lower Silurian of the Gorny Altai. Rossiiskaya Akademiya Nauk Sibirskoe Otdelenie Trudy Instituta Geologii i Geofiziki, 717 1989: 1-224. 116 [Zoological Record Volume 130]