1. In memoriam

   • André Deprit

   Announcement Pages: 138 - 139

2. Editorial announcement

   EditorialNotes Pages: 140 - 140

3. Regularization of the two body problem with variable mass

   • Pierre Guillaume

   OriginalPaper Pages: 141 - 149

4. Editor's note

   EditorialNotes Pages: 149 - 149

5. On the algorithm for constructing periodic solutions of a system of ordinary differential equations not reduced to the characteristic form of Liapounov's system

   • G. I. Shirmin

   OriginalPaper Pages: 151 - 164

6. Tidal parameters from the variation of inclination of GEOS-1 and GEOS-2

   • B. C. Douglas
   • S. M. Klosko
   • R. G. Williamson

   OriginalPaper Pages: 165 - 178

7. Ocean tide perturbations in the orbits of GEOS 1 and GEOS 2

   • Kurt Lambeck

   OriginalPaper Pages: 179 - 182

8. Recent advances in the regularization of the gravitational problem ofn bodies

   • V. Szebehely

   BriefCommunication Pages: 183 - 184

9. A regularization of the three-body problem

   • S. J. Aarseth
   • K. Zare

   OriginalPaper Pages: 185 - 205

10. A regularization of multiple encounters in gravitationalN-body problems

    • Khalil Zare

    OriginalPaper Pages: 207 - 215

11. A global regularisation of the gravitationalN-body problem

    • Douglas C. Heggie

    OriginalPaper Pages: 217 - 241

12. On the multiplication of poisson series

    • Richard J. Fateman

    OriginalPaper Pages: 243 - 247

13. Abstracts of forthcoming papers

    Abstract Pages: 248 - 250