Be stars in open clusters. I. uvby photometry J. Fabregat, J. M. Torrejón, P. Reig, G. Bernabeu, J. Busquets, A. Marco and V. Reglero Astron. Astrophys. Suppl. Ser., 119 2 (1996) 271-279 Published online: 15 October 1996 DOI: 10.1051/aas:1996244