1. Editorial

   • A. G. W. Cameron
   • Z. Kopal
   • M. D. Moutsoulas

   EditorialNotes Pages: 219 - 219

2. The elimination of the critical terms of a first order Uranus-Neptune theory by Hori's method

   • Osman M. Kamel

   OriginalPaper Pages: 221 - 245

3. A correlation between large-scale asymmetry of the Moon and the foci of moonquakes

   • G. X. Song

   OriginalPaper Pages: 247 - 250

4. The shape of the small satellites of Saturn: Gravitational equilibrium vs solid-state strength

   • P. Farinella
   • A. Milani
   • V. Zappala'

   OriginalPaper Pages: 251 - 258

5. Direct conversion of los acceleration data to vertical gravity anomalies: A new approach

   • A. W. Gerhard Kunze

   OriginalPaper Pages: 259 - 265

6. Collisions in self-gravitating clouds of planetesimals

   • K. A. Hämeen-Anttila

   OriginalPaper Pages: 267 - 303

7. Mass loss rate of the zodiacal dust cloud

   • T. Mukai

   OriginalPaper Pages: 305 - 309

8. Origin of the Moon — Capture by gas drag of the Earth's primordial atmosphere

   • Kiyoshi Nakazawa
   • Teruyoshi Komuro
   • Chushiro Hayashi

   OriginalPaper Pages: 311 - 327

9. An estimate of the duct life time from low latitude ground observations of whistlers at Varanasi

   • P. N. Khosa
   • Lalmani
   • V. K. Rawal

   Letter to the Editor Pages: 329 - 333