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- 91191220 contributor B6518429.
- 91191220 created "1991.".
- 91191220 date "1991".
- 91191220 date "1991.".
- 91191220 dateCopyrighted "1991.".
- 91191220 description "Includes bibliographical references.".
- 91191220 extent "317 p. ;".
- 91191220 issued "1991".
- 91191220 issued "1991.".
- 91191220 language "spa".
- 91191220 publisher "Asunción, Paraguay : Imprenta Cromos,".
- 91191220 spatial "Paraguay.".
- 91191220 subject "338.27280989 20".
- 91191220 subject "HD9574.P32 E57 1991".
- 91191220 subject "Petroleum industry and trade Paraguay.".
- 91191220 subject "Petroleum law and legislation Paraguay.".
- 91191220 subject "Petróleos Paraguayos (Firm)".
- 91191220 title "Petróleo en el Paraguay : análisis y ponderación de su valor económico / Efraín Enríquez Gamón.".
- 91191220 type "text".