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  1. 1

    Fichas de Investigación Económica y Social.

    Serial
  2. 2

    Petroleo en Paraguay : analisis y ponderacion de su valor economico / by Enríquez Gamon, Efraín

    Published 1991
    Book
  3. 3

    Comparative analysis of petroleum exploration contracts.

    Published 1995
    Book
  4. 4

    Administration of fiscal regimes for petroleum exploration and development.

    Published 1995
    Book