1. Thicknesses of lunar mare flow fronts

   • Ann W. Gifford
   • Farouk El-Baz

   OriginalPaper Pages: 391 - 398

2. Solar rotation and activity in the past and their possible influence upon the evolution of life

   • Edward H. Geyer

   OriginalPaper Pages: 399 - 405

3. Resonant structures in the solar system

   • J. J. Rawal

   OriginalPaper Pages: 407 - 414

4. Ridges and scarps in the equatorial belt of Mars

   • B. K. Lucchitta
   • J. L. Klockenbrink

   OriginalPaper Pages: 415 - 429

5. On the braids and spokes in Saturn's ring system

   • Jay Roderick Hill
   • D. A. Mendis

   OriginalPaper Pages: 431 - 436

6. The spin periods of masteroids

   • C. -I. Lagerkvist
   • H. Rickman

   OriginalPaper Pages: 437 - 440

7. A lunar crustal gravity model across the Triesnecker-Hyginus area, Mare Tranquillitatis, and Mare Fecunditatis

   • Peter Janle

   OriginalPaper Pages: 441 - 451

8. On the photochemical formation of CN, C₂, and C₃ radicals in cometary comae

   • Tetsuo Yamamoto

   OriginalPaper Pages: 453 - 463

9. Is Mimas differentiated?

   • P. Farinella
   • F. Ferrini
   • A. M. Nobili

   Letters to the Editor Pages: 465 - 466

10. Note on the rings of Saturn

    • J. A. Bastin

    Letters to the Editor Pages: 467 - 467

11. Bibliography

    • Z. Kopal
    • M. Moutsoulas
    • F. B. Waranius

    Legacy Pages: 469 - 506