Social Sciences; Technology -- Chemical technology -- Oils, fats, and waxes; Social Sciences; Oil & Petroleum Products Industry; Social Sciences & Humanities;
History (General) and History of Europe -- History of Asia -- China; Social Sciences -- Social sciences (General); Social Sciences; Social Sciences & Humanities (General);
Social Sciences -- Economic history and conditions -- By region or country; Business and Economics -- Business and Economics (General) -- Economic History, Conditions; Economic History;