Proceedings of the Second Marcel Grossmann Meeting on General Relativity : organized and held at the International Centre for Theoretical Physics, Trieste 5-11 July, 1979. pt. A / edited by Remo Ruffini. Marcel Grossmann Meeting on General Relativity (2nd : 1979 : Trieste, Italy) Ruffini, Remo. ed. International Centre for Theoretical Physics. International Atomic Energy Agency. General relativity (Physics) Congresses. Gravitation Congresses. QC173.6 .M37 1979 530.11 19 INP Includes bibliographical references and index. Amsterdam ; New York : North-Holland, 1982. 1982. 1982 Text v. : eng