1. Publisher's note

   Announcement Pages: v - v

2. Observation and interpretation of cometary low frequency waves

   • A. L. Brinca

   OriginalPaper Pages: 1 - 39

3. The gravitational field of topographic-isostatic masses and the hypothesis of mass condensation II-the topographic-isostatic geoid

   • J. Engels
   • E. W. Grafarend
   • P. Sorcik

   OriginalPaper Pages: 41 - 66

4. Physical mechanisms of man-made influences on the magnetosphere

   • M. Parrot
   • Y. Zaslavski

   OriginalPaper Pages: 67 - 100

5. Atmosphere and Earth's rotation

   • Hans Volland

   OriginalPaper Pages: 101 - 144

6. Book reviews

   • M. Garcia-Fernandez
   • J. Gallart

   BookReview Pages: 145 - 147