PETROSIX and Oil Shalearchival_materialsUnited States. National Archives and Records AdministrationRG84_P71_10PET - PETROLEUM84P71A-5621968-02-21airgramsengEnglishIndustrial RelationsCommercePetrobrasOil-shalesPetrosixBrazilian Ministry of Mines and EnergyCIRBMemorandum of ConversationSão Mateus do SulBRASCONPLAPresident of PetrobrasAmembassy Rio de JaneiroCERP Section DAmembassy São PauloAddressee Amembassy BrasiliaAddresseeAmcon CuritibaAddresseeAmbassador TuthillAuthor