Primordial Helium and ∆Y/∆Z from H II Regions and from Fine Structure in the Main Sequence Based on Hipparcos Parallaxes

Author： Høg E. Pagel B.E.J. Portinari L. Thejll P.A. Macdonald J. Girardi L.

Publisher： Springer Publishing Company

ISSN： 0038-6308

Source： Space Science Reviews, Vol.84, Iss.1-2, 1998-04, pp. : 115-126

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