1. On Lynden-Bell and Katz's definition of gravitational field energy

   • Ø. Grøn

   Research Articles Pages: 889 - 897

2. Axially symmetricpp-waves and their interpretation as extended massless particles

   • G. Lessner

   Research Articles Pages: 899 - 912

3. Normal modes of a model radiating system

   • Kostas D. Kokkotas
   • Bernard F. Schutz

   Research Articles Pages: 913 - 921

4. On conformally related fields in Rosen's bimetric gravitation theory

   • Ilija Lukačević

   Research Articles Pages: 923 - 930

5. Bubble dynamics in the expanding universe

   • K. Maeda

   Research Articles Pages: 931 - 951

6. Perturbations of the Plebanski metric in general relativity. I. Equations for gravitational perturbations

   • Mainuddin Ahmed
   • Patrick Dolan

   Research Articles Pages: 953 - 960

7. Perturbations of the Plebanski metric in general relativity. II. Perturbations of the fermion field

   • Mainuddin Ahmed
   • Patrick Dolan

   Research Articles Pages: 961 - 970

8. Relativistic wave mechanics of spinless particles in a curved space-time

   • G. Cognola
   • L. Vanzo
   • S. Zerbini

   Research Articles Pages: 971 - 982

9. Spin-tensorial concomitants of the spin-tensor field

   • R. J. Noriega
   • C. G. Schifini

   Research Articles Pages: 983 - 989

10. Book review

    • Richard Hansen

    BookReview Pages: 991 - 992

11. Book review

    • N. Straumann

    BookReview Pages: 993 - 994