1. Daily variations of the geomagnetic field

   • Albert T. Price

   OriginalPaper Pages: 151 - 197

2. Inner-belt Van Allen radiation

   • Stanley C. Freden

   OriginalPaper Pages: 198 - 242

3. An analysis of Martian photometry and polarimetry

   • James B. Pollack
   • Carl Sagan

   OriginalPaper Pages: 243 - 299

4. Book review

   • A. Blaauw

   BookReview Pages: 300 - 300