Extension of Tycho catalog for low-extinction windows in the galactic bulgeT. P. Dominici, R. Teixeira, J. E. Horvath, G. A. Medina Tanco and P. Benevides-SoaresAstron. Astrophys. Suppl. Ser., 136 2 (1999) 261-267DOI: https://doi.org/10.1051/aas:1999212