Collisional excitation of hydrogen and the determination ofthe primordial helium abundance from H II regions

Publisher： Edp Sciences

E-ISSN： 1432-0746|378|3|817-825

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.378, Iss.3, 2001-11, pp. : 817-825

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