The third release of the Large Quasar Astrometric Catalog (LQAC-3): a compilation of 321 957 objectsJ. Souchay, A. H. Andrei, C. Barache, T. Kalewicz, C. Gattano, B. Coelho, F. Taris, S. Bouquillon and O. BeckerA&A, 583 (2015) A75DOI: https://doi.org/10.1051/0004-6361/201526092