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_aBustillos Barta, Manuel _97870 |
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| 245 | 1 | 0 | _aContribución al estudio de los materiales aislantes y refractorios nacionales |
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_aVillarroel Quiroga, Germán _97873 |
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_tPetróleo boliviano _dLa Paz : [s.n.], 1962 _g4(3), 1962, p. 31-36 : tab. |
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