Ruffini, Remo <br/><br/>
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 / 
Remo Ruffini; Marcel Grossmann Meeting on General Relativity. 
 - Amsterdam :   North-Holland,   1977. 
<br/><br/><label>Universal Decimal Class. No.: </label>530.12