1. The lifetime of an elementary particle in a field

   • L. C. B. Ryff

   Research Articles Pages: 515 - 519

2. Some rotating, time-dependent Bianchi type-IX cosmologies with heat flow

   • Egils Sviestins

   Research Articles Pages: 521 - 523

3. The motion of a classical spinning particle in a Riemann-Cartan space-time

   • Ricardo Amorim

   Research Articles Pages: 525 - 533

4. The gravitational contribution to the momentum of a medium in general relativity

   • Thomas W. Noonan

   Research Articles Pages: 535 - 544

5. Space as a “bucket of dust”

   • G. Nagels

   Research Articles Pages: 545 - 557

6. The time-symmetric initial value problem for a homogeneous, anisotropic, empty, closed universe, using Regge calculus

   • Ruth M. Williams

   Research Articles Pages: 559 - 571

7. A constraint on physical quantum states in cosmological space-times

   • A. H. Najmi
   • A. C. Ottewill

   Research Articles Pages: 573 - 578

8. On the scalar-tetradic theories of gravitation: Cosmology and gravitational radiation

   • D. Sáez

   Research Articles Pages: 579 - 593

9. Can Einstein's definition of simultaneity be considered a convention?

   • R. De Ritis
   • S. Guccione

   Research Articles Pages: 595 - 598

10. Propagation of gravitational waves in Robertson-Walker backgrounds

    • Allen I. Janis

    Research Articles Pages: 599 - 612

11. Book review

    • W. Dietz
    • Jiří Bičák

    BookReview Pages: 613 - 619