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2003RMxAC..18...56L - Rev. Mex. Astron. Astrofis. Serie de Conf., 18, 56-59 (2003)
Photoionization models of metal-poor extragalactic H II regions and the primordial helium abundance.
LURIDIANA V., PEIMBERT A. and PEIMBERT M.
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Simbad objects: 3
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