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1967

Yugoslavia and Danube Countr …

World Atlas

Yugoslavia and Danube Countr …

1964

South East Europe, Selected …

World Atlas

South East Europe, Selected …

1963

Romania. Bulgaria. Pergamon …

World Atlas

Romania. Bulgaria. Pergamon …

1967

Bulgaria. Pergamon World Atl …

World Atlas

Bulgaria. (inset) Sofiya (So …