F, G and K stars in the ROSAT all-sky survey - I. PhotometryA. D.F. Metanomski, L. Pasquini, J. Krautter, G. Cutispoto and T. A. FlemingAstron. Astrophys. Suppl. Ser., 131 2 (1998) 197-208DOI: https://doi.org/10.1051/aas:1998431