EHLERS(J) Ed. <br/><br/>
"Intl. school of physics""Enrico Fermi"" Course67(28 June-10 July 1976). Proceedings: Iso-lated gravitating systems in general relativity." 

 -  North Holland  1979 
 - xi p. + 497 
 - "Intl. School of Physics ""Enrico Fermi""" .