On the gravitational field of a massless particle P. C. AichelburgR. U. Sexl Research Articles Pages: 303 - 312
On the meaning of the Einstein- and the Lorentz-covariant derivation Hans -Juergen Treder Research Articles Pages: 313 - 319
On Datta's spherically symmetric systems in general relativity Hermann Bondi Research Articles Pages: 321 - 329
Static gravitational multipoles — The connection between field and source in general relativity C. J. S. ClarkeD. W. Sciama Research Articles Pages: 331 - 345
On the gravitational field acting as an optical medium Fernando de Felice Research Articles Pages: 347 - 357
C∞ solutions of hyperbolic non linear equations applications in G.R.G. Yvonne Choquet-Bruhat Research Articles Pages: 359 - 362
A universe embedded in a five-dimensional flat space Itzhak GoldmanNathan Rosen Research Articles Pages: 367 - 384
On spherically symmetric perfect fluid distributions and class one property J. Krishna Rao Letter to the Editor Pages: 385 - 386
Report on GR6, The International Conference on Gravitation and Relativity, Copenhagen, 5th–10th July 1971 M. Camenzind Report Pages: 387 - 407
