Massive spectroscopic and imaging surveys of individual stars in the Milky Way are opening windows on the formation of the first elements and the nature of the assembly of the Galaxy.
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Beers, T., Carollo, D. Overcoming great barriers. Nature Phys 5, 463–464 (2009). https://doi.org/10.1038/nphys1327
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DOI: https://doi.org/10.1038/nphys1327