Broad-band photometry of a sample of giants with 0.5 [Fe/H] -3 A. Alonso, S. Arribas and C. Martínez-Roger Astron. Astrophys. Suppl. Ser., 131 2 (1998) 209-219 Published online: 15 August 1998 DOI: 10.1051/aas:1998262