1. Bergeron J. , Boulade O. , Kunth D. , Tytler D. , Boksenberg A. & Vigroux L. (1987c). Astron. Ap., in press.
2. Wolfe A.M. (1987). In QSO Absorption Line: Probing the Universe. Eds Blades C. , Norman C. & Turnshek D. , Cambridge University Press, in press.
3. Bergeron J. & D'Odorico S. (1987). in preparation.
4. The near-ultraviolet spectrum of the high-redshift BL Lacertae object 0215 + 015