. . . . "Conference papers and proceedings" . "Gravitation and relativity : at the turn of the millennium ; proceedings of the GR-15 conference, held at IUCAA, Pune, India, during December 16 - 21, 1997" . . "Gravitation and relativity at the turn of the millennium, proceedings of the GR-15 conference held at IUCAA, Pune, India, during December 16-21, 1997" . . . . . . . . . . "Gravitation and relativity : at the turn of the millennium : proceedings of the GR-15 conference, held at IUCAA, Pune, India, during December 16-21, 1997" . . . . . . . "Conference proceedings" . . . . . . . "GR-15 conference" . "Inter-University Center for astronomy and astrophysics." . . "Relativité générale (physique)" . . "Relativité générale (physique)." . "GR (15 1997.12.16-21 Pune)" . . . "Relativité." . . "International Conference on General Relativity and Gravitation (15 1997.12.16-21 Pune)" . . . "International Conference on General Relativity and Gravitation (15th ; 1997)" . . . "International Conference on General Relativity and Gravitation (15th : 1997 : Pune, India)" . . . "gravitation." . . "Gravitation." .