1. Direct solar and earth-albedo radiation pressure effects on the orbit of Pageos 1

   • Susanna Zerbini

   OriginalPaper Pages: 307 - 334

2. Perturbations due to the shape of the Moon in lunar theory

   • J. Henrard

   OriginalPaper Pages: 335 - 341

3. The inclination changes in the problem of two triaxial rigid spheroids

   • M. Šidlichovský

   OriginalPaper Pages: 343 - 355

4. Direct perturbations of the planets on the Moon's motion

   • D. Standaert

   OriginalPaper Pages: 357 - 369

5. Stability criteria in many-body systems

   • Ian W. Walker
   • A. Gordon Emslie
   • Archie E. Roy

   OriginalPaper Pages: 371 - 402

6. Bifurcations of triple-periodic orbits

   • G. Contopoulos
   • P. Michaelidis

   OriginalPaper Pages: 403 - 413

7. Johann Heinrich Lambert and the determination of orbits for planets and comets

   • Volk O.

   Erratum Pages: 415 - 415