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The chemical composition of the galactic H II regions M8 and M17. A revision based on deep vlt echelle spectrophotometry
chemical composition vlt echelle spectrophotometry galactic H II
2009/7/9
The chemical composition of the galactic H II regions M8 and M17. A revision based on deep vlt echelle spectrophotometry。
Oxygen and helium abundances in galactic h II regions：abundance gradients
h II regions Oxygen helium
2009/6/5
Oxygen and helium abundances in galactic h II regions：abundance gradients。