1. Einstein-Maxwell space-times with symmetries and with non-null electromagnetic fields

   • C. B. G. McIntosh

   Research Articles Pages: 277 - 288

2. Charge in cosmological models

   • M. L. Bohra
   • A. L. Mehra

   Research Articles Pages: 289 - 297

3. On homogeneous solutions of Einstein's field equations

   • Robert E. Hiromoto
   • István Ozsváth

   Research Articles Pages: 299 - 327

4. A plan to study the “standard hot big-bang model” of the universe

   • Ramesh Chandra

   Research Articles Pages: 329 - 338

5. Bimetric gravitation theory on a cosmological basis

   • Nathan Rosen

   Research Articles Pages: 339 - 351

6. Classical gravity with higher derivatives

   • K. S. Stelle

   Research Articles Pages: 353 - 371