Columbia subject headings:
Germany--Foreign relations--Ukraine.
Iron mines and mining--Ukraine--Kryvyĭ Rih--History.
Iron ores--Ukraine--Kryvyĭ Rih--History.
Kryvyĭ Rih (Ukraine)--History.
Socialism--Ukraine--Kryvyĭ Rih--History.
Ukraine--Foreign relations--Germany.
Harvard subject headings:
Communist countries--Economic integration.
Council for Mutual Economic Assistance--Germany (East)--History.
Council for Mutual Economic Assistance. Project BAK--History.
Europe, Eastern--Economic integration.
Europe, Eastern--Foreign economic relations--Germany (East)
Europe, Eastern--Foreign economic relations--Germany (West)
Germany (East)--Foreign economic relations--Europe, Eastern.
Germany (West)--Foreign economic relations--Europe, Eastern.
Iron industry and trade--Ukraine--Kryvyĭ Rih--History.
Iron mines and mining--Economic aspects--Ukraine--Kryvyĭ Rih--History.
Princeton subject headings:
Germany--Foreign relations--Ukraine.
Iron mines and mining--Ukraine--Kryvyĭ Rih--History.
Iron ores--Ukraine--Kryvyĭ Rih--History.
Kryvyĭ Rih (Ukraine)--History.
Socialism--Ukraine--Kryvyĭ Rih--History.
Ukraine--Foreign relations--Germany.