1. Normal forms for real linear Hamiltonian systems with purely imaginary eigenvalues

   • N. Burgoyne
   • R. Cushman

   OriginalPaper Pages: 435 - 443

2. On the long-term motion of Pluto

   • Paul E. Nacozy
   • Roger E. Diehl

   OriginalPaper Pages: 445 - 454

3. On the Principle of Least Interaction Action and the Laplacean satellites of Jupiter and Uranus

   • Michael W. Ovenden
   • Terry Feagin
   • Otis Graf

   OriginalPaper Pages: 455 - 471

4. Escape or retention in the three-body problem

   • J. S. Griffith
   • R. D. North

   OriginalPaper Pages: 473 - 479

5. Sequential filter design for precision orbit determination and physical constant refinement

   • D. W. Curkendall
   • C. T. Leondes

   OriginalPaper Pages: 481 - 494

6. Sur les solutions particulières du problème généralisé des trois corps solides

   • G. N. Doubochine

   OriginalPaper Pages: 495 - 521

7. The Ideal Resonance Problem: A comparison of the solutions expressed in terms of mean elements and in terms of initial conditions

   • Alan H. Jupp

   OriginalPaper Pages: 523 - 530

8. Abstracts of forthcoming papers

   Abstract Pages: 531 - 533

9. Effects of gravity-gradient torque on the rotational motion of a triaxial satellite in a precessing elliptic orbit

   • John E. Cochran

   Errata Pages: 534 - 534