Group theory of the massless spin 2 field and gravitation U. Niederer Research Articles Pages: 433 - 437
Response of Doppler spacecraft tracking to gravitational radiation Frank B. EstabrookHugo D. Wahlquist Research Articles Pages: 439 - 447
Blueshift and spectral features of the gravitational searchlight S. M. ChitreJ. V. NarlikarR. C. Kapoor Research Articles Pages: 477 - 487
A characterization of the Bondi-Metzner-Sachs group Bernd SchmidtMartin WalkerPaul Sommers Research Articles Pages: 489 - 497
Class two analogue of T. Y. Thomas's theorem and different types of embeddings of static spherically symmetric space-times Y. K. GuptaPramila Goel Research Articles Pages: 499 - 505
A remark on the generalized Goldberg-Sachs theorem Egon KöhlerMartin Walker Research Articles Pages: 507 - 512
Epistemological questions concerning cosmology and gravitation André Mercier Research Articles Pages: 513 - 536