Title: Dvustvorchatye molli͡u︡ski verkhnevizeĭskikh, nami͡u︡rskikh i bashkirskikh otlozheniĭ Bolʹshogo Donbassa
Subjects: Fossil Bivalvia, Paleontology, Fossil Bivalves
Places: Donets Basin (Ukraine and Russia)
Time periods: Carboniferous