1. Ephemeris of a highly eccentric orbit: Explorer 28

   • Barbara E. Lowrey

   OriginalPaper Pages: 107 - 125

2. On the periodic solutions of slowly spinning gravity gradient system

   • V. J. Modi
   • J. E. Neilson

   OriginalPaper Pages: 126 - 143

3. Optimum aim point biasing in case of a planetary quarantine constraint

   • G. S. Gedeon
   • V. N. Dvornychenko

   OriginalPaper Pages: 144 - 156

4. Interaction between attitude libration and orbital motion of a rigid body in a near keplerian orbit of low eccentricity

   • Srinivas N. Mohan
   • John V. Lange
   • Benjamin O. Lange

   OriginalPaper Pages: 157 - 173

5. An intermediate matching technique for solving two point boundary value problems using the perturbation method

   • W. E. Williamson

   OriginalPaper Pages: 174 - 188

6. Regularization in the Ideal Resonance Problem

   • Boris Garfinkel

   OriginalPaper Pages: 189 - 203

7. Theory of an experiment in an orbiting space laboratory to determine the gravitational constant

   • John P. Vinti

   OriginalPaper Pages: 204 - 254

8. Abstracts of forthcoming papers

   Abstract Pages: 255 - 257

9. Errata

   • G. N. Duboshin

   Erratum Pages: 258 - 258