Radio loudness along the quasar main sequence V. Ganci, P. Marziani, M. D’Onofrio, A. del Olmo, E. Bon, N. Bon and C. A. Negrete A&A, 630 (2019) A110 Published online: 30 September 2019 DOI: 10.1051/0004-6361/201936270