The Hamburg Quasar Survey - II. A first list of 121 quasars D. Engels, H.-J. Hagen, L. Cordis, S. Köhler, L. Wisotzki and D. Reimers Astron. Astrophys. Suppl. Ser., 128 3 (1998) 507-523 Published online: 15 March 1998 DOI: 10.1051/aas:1998390