Columbia subject headings:
Iron ores--Ukraine--Kryvyĭ Rih.
Kryvyĭ Rih (Ukraine)--Economic conditions.
Kryvyĭ Rih (Ukraine)--Pictorial works.
Harvard subject headings:
Princeton subject headings:
Iron ores--Ukraine--Kryvyĭ Rih.
Kryvyĭ Rih (Ukraine)--Economic conditions.
Kryvyĭ Rih (Ukraine)--Pictorial works.