The stellar content of the Hamburg/ESO survey - IV. Selection of candidate metal-poor stars N. Christlieb, T. Schörck, A. Frebel, T. C. Beers, L. Wisotzki and D. Reimers A&A, 484 3 (2008) 721-732 Published online: 11 March 2008 DOI: 10.1051/0004-6361:20078748