Oil! oil museums in Kern County, California and the libraries and museums in the area around Silver City, New Mexico, as well as the period photography, which played a large part in shaping his screenplay and the film. Oil! Oil! is a novel by Upton Sinclair, first published in 1926–27 and told as a third-person narrative, with only the opening pages written in the first person. The book was written in the context of the Harding administration's Teapot Dome Scandal and takes place in Southern California. It is a social and political satire skewering the human foibles of all its characters.
Oil shale in Estonia Eesti Põlevkivitööstus (), was the predecessor of Viru Keemia Grupp, one of the current shale oil producers in Estonia. It took over the existing Pavandu open-pit mine, and opened new mines at Vanamõisa (1919), Kukruse (1920), and Käva (1924). Also, several private investors, including investors from abroad, initiated oil shale industries in Estonia by opening mines at Kiviõli (1922), Küttejõu (1925), Ubja (1926), Viivikonna (1936), and Kohtla (1937). Pavandu mine was closed in 1927 and Vanamõisa mine was closed in 1931. While in 1918 only 16 tonnes and in 1919 only 9,631 tonnes of oil shale were mined, in 1937