Columbia subject headings:
Harvard subject headings:
Akademii︠a︡ nauk SSSR
Geology, Stratigraphic--Maps
Geology--Soviet Union--Maps
Paleogeography--Maps.
Petrology--Soviet Union--Maps.
Soviet Union. Ministerstvo geologii.
Princeton subject headings:
Akademii︠a︡ nauk SSSR.
Geology, Stratigraphic--Maps.
Geology--Soviet Union--Maps.
Maps.
Paleogeography--Maps.
Petrology--Soviet Union--Maps.
Soviet Union. Ministerstvo geologii