1. Lunar and Planetary Robotic Exploration Missions in the 20th Century

   • W.T. Huntress Jr.
   • V.I. Moroz
   • I.L. Shevalev

   OriginalPaper Pages: 541 - 649

2. Commentary on an Ailing Theory

   • M.M. Woolfson

   OriginalPaper Pages: 651 - 663

3. Elemental Abundances in the Solar Upper Atmosphere Derived by Spectroscopic Means

   • U. Feldman
   • K.G. Widing

   OriginalPaper Pages: 665 - 720

4. Volume Contents 107

   OriginalPaper Pages: 721 - 724