In which decade were the first oil fields discovered in Saudi Arabia?
1930’s Thirties 1930s literature Nineteen-thirties 1930–1939 1930-1939 '30s 1930s 1930's %6030s 1930s (decade) The Thirties
1930–1939 30s nineteen thirties 1930 1939 thirties 1930s literature 1930s decade 1930s 1930 s 6030s
1930 s
WikipediaEntity
1930's