1. The expansion of negative powers of the mutual distance between two planets

   • Osman M. Kamel
   • Adel S. Soliman

   OriginalPaper Pages: 197 - 200

2. Mars and its magnetic field— Some new aspects

   • I. Orgzall
   • S. Franck

   OriginalPaper Pages: 201 - 210

3. Spectral studies of the time-series of the geomagnetic activities

   • M. Dizer
   • A. Ozguc

   OriginalPaper Pages: 211 - 220

4. Spectrophotometric study of comet Bradfield (1987s)

   • B. S. Rautela
   • B. B. Sanwal

   OriginalPaper Pages: 221 - 225

5. On the instability region around the 5 : 3 Jovian resonance

   • Silvia Fernández
   • Cristián Beaugé

   OriginalPaper Pages: 227 - 232

6. Methods of Venus radiolocation map synthesis using strip images of VENERA-15 and VENERA-16 space stations

   • I. Bockstein
   • P. Chochia
   • M. Kronrod

   OriginalPaper Pages: 233 - 259

7. Secular love and tidal numbers of synchronously orbiting satellites

   • M. Burša

   OriginalPaper Pages: 261 - 265

8. A determination of secular terms in first-order planetary theory

   • Osman M. Kamel

   OriginalPaper Pages: 267 - 269

9. Determination of secular terms in general planetary theory

   • Osman M. Kamel

   OriginalPaper Pages: 271 - 273

10. Dynamical evolution of the rotation of Venus

    • M. Shen
    • C. Z. Zhang

    OriginalPaper Pages: 275 - 287

11. Conditionally-periodic solutions of the Hamiltonian systems with multiple resonance

    • M. K. M. Ahmed
    • M. H. A. Yousef

    OriginalPaper Pages: 289 - 298

12. Color enhanced imagery of major geological features on Mars

    • Kent D. Trego

    Letter To The Editor Pages: 299 - 306

13. A note on the gravitational field of Phobos

    • Nils Aall Barricelli

    Letter To The Editor Pages: 307 - 309