1. The construction of a third order secular

   • Osman M. Kamel
   • Abdel Aziz Bakry
   • Salwa M. Waziry

   OriginalPaper Pages: 97 - 117

2. Gravitational potential energy of the major planets

   • Milan Burša
   • Ondřejka Hovorková

   OriginalPaper Pages: 119 - 128

3. Sapas Mons, Venus: evolution of a large shield volcano

   • Susan T. Keddie
   • James W. Head

   OriginalPaper Pages: 129 - 190

4. Nongravitational forces and meteoroid streams

   • Jozef Klačka

   Letter to the Editor Pages: 191 - 196

5. Book reviews

   • P. Mayer
   • Marek Wolf

   BookReview Pages: 197 - 198