Letter from Thomas Gold to Dr Heinz Volk, Max-Planck-Institut fur Kernphysik, D-6900 Heidelberg 1, Postfach 10 39 80, West Germany Gold is travelling to Munchen in December, and will be there from December 16-20, at the invitation of the M.P.I. (Astrophysics). He could spare one day, such as the 18th, for a visit to Heidelberg. Asks if that would be of any interest. They could discuss his present work on outgassing, and of course a variety of planetary problems. Gold would enjoy an exchange of ideas, as they have thought about the same problems. 8 August 1978