1. Argue, A.N., 1986. This Volume.
2. Grenon, M., 1986. This Volume.
3. INCA, 1985. ‘Hipparcos — The Scientific Aspects of the Input Catalogue Preparation’, Proceedings of the INCA Colloquium, Aussois, June 1985, (Turon, C. & Peryman, M.A.C., eds), ESA SP-234.
4. Perryman, M.A.C., 1986. This Volume.
5. Requième, Y., 1986. This Volume.