1. The quantity and condition of Martian underground water

   • G. H. A. Cole

   OriginalPaper Pages: 97 - 102

2. Optical reflection from planetary surfaces as an operator-eigenvalue problem

   • Robert L. Wildey

   OriginalPaper Pages: 103 - 116

3. Photodissociation lifetime of ³²S₂ molecule in comets

   • A. A. De Almeida
   • P. D. Singh

   OriginalPaper Pages: 117 - 125

4. The stability of the cometary plasma tail and rays

   • A. I. Ershkovich
   • D. A. Mendis

   OriginalPaper Pages: 127 - 134

5. Possible satellites of Mercury and Venus

   • J. J. Rawal

   OriginalPaper Pages: 135 - 138

6. Comments on ‘the origin of the Earth—Moon system’

   • P. Savić
   • G. Teleki

   OriginalPaper Pages: 139 - 143

7. Optical constants of the mixture of ices

   • T. Mukai
   • W. Krätschmer

   OriginalPaper Pages: 145 - 155

8. Heat conduction within an elastic Earth

   • Paolo Lanzano

   OriginalPaper Pages: 157 - 166

9. Lunar and Venusian radar bright rings

   • T. W. Thompson
   • R. S. Saunders
   • D. E. Weissman

   OriginalPaper Pages: 167 - 185

10. A note on the total mass of comets in the solar system

    • D. A. Mendis
    • M. L. Marconi

    Letter to the Editor Pages: 187 - 190

11. Book Reviews

    BookReview Pages: 191 - 192