Be stars in open clusters. I. uvby photometryJ. Fabregat, J. M. Torrejón, P. Reig, G. Bernabeu, J. Busquets, A. Marco and V. RegleroAstron. Astrophys. Suppl. Ser., 119 2 (1996) 271-279DOI: https://doi.org/10.1051/aas:1996244