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|a Sistema de Bibliotecas de la Universidad de Panamá
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|a spa
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|a T - 621.30681 - D36
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|a De Gracia H., Edmundo G.
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|a Costos marginales de la energía eléctrica
|c / Edmundo G. De Gracia H. , Carlos D. Baquero G.
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|a Panamá
|b : Universidad
|c , 1981.
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|a xi, 171
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|c ; 27cm.
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|a Baquero G., Carlos D.
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|t e.1
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