00253nam a2200109 a 450000500170000008200200001710000210003724500380005826000220009630000160011849000090013420251203091519.0  a523.11,bD, Nar  aNarlikar, Jayant  aVoilent phenomena in the universe  aMadrasbOupc1982  ax,218p, 2cm  aOUPS