@book{580184,
	author = {Ruffini, Remo},
	title = {Proceedings of the first Marcel Grossman Meeting on General Relativity organized and held at the International Centre for Theoretical Physics, Trieste and Istituto di Fisica Teorica, University of Trieste, 7-12 July, 1975 /},
	publisher = {North-Holland, },
	year = {1977.},
	address = {Amsterdam : }
}