1. On the fundamental groups of space-times in general relativity

   • Kotik K. Lee

   Research Articles Pages: 239 - 242

2. On the theory of inertial gravitational fields

   • L. D. Raigorodski

   Research Articles Pages: 243 - 252

3. Boundary conditions in closed universes

   • J. K. Lawrence

   Research Articles Pages: 253 - 258

4. A bi-metric theory of gravitation. II

   • Nathan Rosen

   Research Articles Pages: 259 - 268

5. On Rosen's bi-metric theory of gravitation

   • Hüseyin Yilmaz

   Research Articles Pages: 269 - 276

6. Bi-metric theories of gravitation

   • Dierck -Ekkehard Liebscher

   Research Articles Pages: 277 - 280

7. The field of a rotating charged body emitting null fluid

   • L. K. Patel
   • M. Misra

   Research Articles Pages: 281 - 288

8. Killing vector fields and the Einstein-Maxwell field equations in general relativity

   • H. Michalski
   • J. Wainwright

   Research Articles Pages: 289 - 318

9. Gravitational radiation recoil on anN-body system

   • Demetrios D. Dionysiou

   Research Articles Pages: 319 - 324

10. Book review

    OriginalPaper Pages: 325 - 328