1. Third-order Uranus-Neptune planetary theory

   • Osman M. Kamel
   • Abdel Aziz Bakry

   OriginalPaper Pages: 97 - 116

2. Interaction within the ionosphere in the presence of geomagnetic field

   • S. S. De
   • J. Bandyopadhyay
   • S. Bandyopadhyay

   OriginalPaper Pages: 117 - 126

3. Tepev Mons on Venus: Morphology and elastic bending models

   • P. Janle
   • D. Jannsen
   • A. T. Basilevsky

   OriginalPaper Pages: 127 - 139

4. The surface integral approach to Radarclinometry

   • Robert L. Wildey

   OriginalPaper Pages: 141 - 153

5. End-states of short-period comets and their role in maintaining the zodiacal dust cloud

   • Julio A. Fernández

   OriginalPaper Pages: 155 - 161

6. Grain-size influence on the mid-infrared spectra of the minerals

   • Gabriele Arnold
   • Christoph Wagner

   OriginalPaper Pages: 163 - 171

7. The interstellar medium and the glacial eras during the Pleistocene

   • R. D. Tarsia
   • R. J. Quiroga
   • G. A. Pellegatti franco

   OriginalPaper Pages: 173 - 190

8. New results on the strato-mesospheric cooling of the Northern Hemisphere (1969–1978)

   • C. Varotsos

   Letter to the Editor Pages: 191 - 196

9. Temperature of cometary dust

   • Th. Henning
   • U. Weidlich

   Letter to the editor Pages: 197 - 200