1. A Complete Set of Riemann Invariants

   • E. Zakhary
   • C. B. G. Mcintosh

   OriginalPaper Pages: 539 - 581

2. Tensor Expressions for Solving Einstein's Equations by the Method of Sequential Approximation

   • Irene P. Denisova
   • Binita V. Mehta

   OriginalPaper Pages: 583 - 589

3. Gravity and Signature Change

   • Tevian Dray
   • George Ellis
   • Corinne A. Manogue

   OriginalPaper Pages: 591 - 597

4. Integrability of Multicomponent Models in Multidimensional Cosmology

   • V. R. Gavrilov
   • V. D. Ivashchuk
   • V. N. Melnikov

   OriginalPaper Pages: 599 - 612

5. A Quasi-Spherical Gravitational Wave Solution in Kaluza-Klein Theory

   • Malek Zareyan

   OriginalPaper Pages: 613 - 620

6. Machian Mechanics with Isotropic Inertia

   • Peter Eby

   OriginalPaper Pages: 621 - 635

7. Editor's Note: The Expanding Universe, by the Abbé Georges Lemaître

   • Andrzej Krasiński

   Editorial Commentary Pages: 637 - 640

8. The Expanding Universe

   • Abbé Georges Lemaître

   OriginalPaper Pages: 641 - 680

9. Erratum

   Erratum Pages: 681 - 681