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Las fronteras del porvenir by Drucker, Peter Ferdinand, 1909 | Flax Marcó, Enrique [seud.]. Material type:  Text Language: Spanish Publisher: Buenos Aires : Hobbs-Sudamericana, [1967]Availability: Items available for loan: Biblioteca Central UNNECall number: 301.175 D794 f ej.1 (1).
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Ayuda económica y subdesarrollo by Benham, Frederic Charles. Material type: Text Language: Spanish Publisher: Buenos Aires : Hobbs ; Sudamericana, c1965Availability: Items available for loan: Biblioteca Central UNNECall number: 338 B436 ej.1 (1).
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Los rayos cósmicos by Rossi, Bruno. Material type: Text Language: Spanish Publisher: Buenos Aires : Hobbs-Sudamericana, [1968]Availability: Items available for loan: Biblioteca Central UNNECall number: 537.591 R831 ej.1 (1).
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El origen de América : 30000 años de su historia by Hibben, Frank C. Material type: Text Language: Spanish Publisher: Buenos Aires : Hobbs-Sudamericana, 1966Availability: Items available for loan: Biblioteca Central UNNECall number: 571(7/8) H624 ej.3 (1).
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