1. Editorial

   • R. K. Squires

   EditorialNotes Pages: 271 - 271

2. On the orbital isochronism

   • Fang Toh Sun

   OriginalPaper Pages: 272 - 288

3. On a transformation of the differential equations of the lunar theory

   • Peter Musen

   OriginalPaper Pages: 289 - 311

4. An exact differential form to check analytical theories

   • André Deprit

   OriginalPaper Pages: 312 - 319

5. Commensurable eccentric orbits near critical inclination

   • R. R. Allan

   OriginalPaper Pages: 320 - 330

6. Echeloned Series Processor (ESP)

   • Arnold Rom

   OriginalPaper Pages: 331 - 345

7. Resonant and non-resonant gravity-gradient perturbations of a tumbling tri-axial satellite

   • Donald L. Hitzl
   • John V. Breakwell

   OriginalPaper Pages: 346 - 383

8. Explicit recursive algorithms for the construction of equivalent canonical transformations

   • William A. Mersman

   OriginalPaper Pages: 384 - 389

9. Automated, closed form integration of formulas in elliptic motion

   • William H. Jefferys

   OriginalPaper Pages: 390 - 394

10. Die Aufspaltung der Variationsgleichungen des Elliptischen Eingeschränkten Dreikörperproblems

    • J. Tschauner

    OriginalPaper Pages: 395 - 402