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Geisler, Doug; Wallerstein, George; Smith, Verne V.; Casetti-Dinescu, Dana I., Chemical Abundances and Kinematics in Globular Clusters and Local Group Dwarf Galaxies and Their Implications for Formation Theories of the Galactic Halo, The Publications of the Astronomical Society of the Pacific, September 2007, 119 (859): 939–961, Bibcode:2007PASP..119..939G, arXiv:0708.0570, doi:10.1086/521990
Geisler, Doug; Wallerstein, George; Smith, Verne V.; Casetti-Dinescu, Dana I., Chemical Abundances and Kinematics in Globular Clusters and Local Group Dwarf Galaxies and Their Implications for Formation Theories of the Galactic Halo, The Publications of the Astronomical Society of the Pacific, September 2007, 119 (859): 939–961, Bibcode:2007PASP..119..939G, arXiv:0708.0570, doi:10.1086/521990
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