Federal Trade Commission survey; Sinclair Prairie Pipe Line Company - materials and supplies, capital structure, incorporation; legal cases (Pure Oil Pipe Line Company, Long Oil Company, Prairie Oil and Gas); Long Oil Company dissolution; Parco Oil Company dissolution, 1920 - 1960

Marketing matter pamphlets (federal trade commission survey of controversial marketing practices in the petroleum products retail industry) (1939); Sinclair Prairie Pipe Line Company - transfer of materials and supplies from Sinclair Pipe Line Company, Sinclair Oil & Gas Company of LA to Sinclair Texas Pipe Line Company (1920-1921); Sinclair Prairie Pipe Line Company - capital structure and incorporation papers (1932-1936); Dillingham vs Pure Oil Pipe Line Company (1933); Long Oil Company vs Insurance companys (Northwestern Insurance Co., Aetna Insurance Co., Penn Mutual Life Ins. Co.) and Tennant vs Prairie Oil & Gas Company (1932-1935); Long vs Prairie Oil & Gas Company (1932-1935); Long Oil Company liquidation - purchase of minority stock, list of stockholders (1932-1960), proceedings of directors/shareholders (1932-1933), letters to other oil companies inviting bids and replies thereto (1932-1933); Long Oil Company dissolution, charter, bylaws, certificate of dissolution (1933); Parco Oil Company, LTD. (a Canadian corporation) dissolution proceedings (1939)