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|a Sistema Bibliotecario Universidad de El Salvador
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| 094 |
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|a Ing. Civil
|b M-21
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| 100 |
1 |
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|a Martínez, Nestor Salvador,
|e autor
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| 245 |
1 |
1 |
|a Perforaciones para vapores termales /
|c presentado por, Nestor Salvador Martínez.
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| 260 |
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|a San Salvador :
|b U.E.S.,
|c 1956
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| 300 |
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|a 121 h. ;
|c 28 cm.
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| 502 |
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|a Tesis (Ingeniería Civil)--Universidad de El Salvador, San Salvador, 1956.
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| 592 |
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|a Orígen de los vapores termales -- La sonda rotary -- El fango de circulación -- Técnica de la perforación
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