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035 _aHEM0002419
041 _aSPA
245 0 0 _aJournal of Research of the National Bureau of Standards.
902 _aIngeniería Mecánica y Eléctrica
905 _a05
942 2 _cNEWBFXC11
999 _c221958
_d221958
980 _851
_gRonald RUIZ